GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: Night_Raider_ on August 08, 2015, 12:43:17 PM
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I finally got my pump yesterday so I was trying out my Disco for the first time. I was kind of disappointed with the accuracy I was getting at 25 yards. This was a 50 shot string at 25 yards with about 25 shots in the ragged hole the size of a half dollar (just measured it: 1.25"). Is this decent accuracy for this gun, or do I have some tuning and practice to do? Most of the fliers were from the gun getting up to speed and then going back down.
BTW, the pellets were canned CPUM 14.3s; I tried CPHPs but they did even worse. Also, the accuracy was even worse in the beginning but got up to this point after I pulled some dry patches through it.
I am afraid I am going to have to go through the hassle of buying and installing another barrel, but hopefully it's just something I can tune out.
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I would be looking at different pellets first.
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Do a search on here for "discovery accuracy" you will get so much info it will set your head swimming.
Just to get started...Have you cleaned the barrel (thoroughly)? Is the gun new? Have you done any mods to it? What pressure are you pumping it up to? What pressure are you shooting it down to? Have you tried different pellets (more than two)? Do you have a chrony??
If you're getting 25 shots touching at 25 yds with the newer, unmodded Discos...you've got a keeper! With a little tweaking these guns can be very accurate!
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Are you using a scope? Also, try different pellets. My Discovery .22 like the JSB EXACT JUMBO 15.89 gr best of all I have tried. (Probably tried ten different pellets.) Your milage may vary!
Good luck!
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25 shots without refilling is unlikely to give you a tight group. fatigue also sets in depending on how quickly you were shooting.
mine likes H&N 14.66 5.53 head size and JSB 18.13g pellets the best. crosmans shoot poorly in my disco
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For the most part I know what I am doing, I just wanted other people's opinions beforehand. The gun is used, I haven't been able to figure out how to get the TKO off (yes, I took the screws out, but it's just kinda stuck) so I can't really clean it, and no, I haven't been able to try any more pellets than that because Walmart doesn't stock em and since Amazon and eBay don't really have any acceptable prices for pellets. I'm not sure I can convice my dad to order from Pyramyd. I'm just having to work with what I've got locally, for the most part. I have looked through the forum for accuracy reports, but it's been a month or so and from what I remember there wasn't much to be had for 25 yards.
It has a 2 screw trigger mod, power adjuster, 6.5" TKO, two coils cut from the hammer (believe that's the right term) spring, and a second barrel band. Core group was from about 1850psi to 1150psi. Yes, I have a chrony, and have been using it for every group I've shot with it so far. I am guessing the guy that had it before me tuned it, but I'm not sure what pellets he used. Also, I just shot another group with it just now and got a .9" group with about 20 shots (the ones that were within 4%). I'm shooting the pellets from 760 to 790fps.
Scope is a no name 3-9x40mm mildot with a bubble level built in, so I know it wasn't cant.
Sorry I didn't mention all of this earlier; I didn't think about it at the time.
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If everything seems ok as others have mentioned check these posts out. This is only intended to help you look for a problem and I am not suggesting it is a problem with your gun.
http://www.gatewaytoairguns.org/GTA/index.php?topic=58642.msg563033#msg563033 (http://www.gatewaytoairguns.org/GTA/index.php?topic=58642.msg563033#msg563033)
My Barrel on my Disco review on Youtube https://www.youtube.com/watch?v=p6QZbcp9Jqw (https://www.youtube.com/watch?v=p6QZbcp9Jqw)
Bad muzzle crown pic.. http://www.webexpressplus.com/disco/badcrown.jpg (http://www.webexpressplus.com/disco/badcrown.jpg)
Just take it one step at a time and slowly, also as mentioned get some JSB 15.9 pellets and 18.1 grain and try those.
You should only be shooting about 12 to 15 shots per fill from 2000 PSI to 1000 PSI
William
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For the most part I know what I am doing, I just wanted other people's opinions beforehand. The gun is used, I haven't been able to figure out how to get the TKO off (yes, I took the screws out, but it's just kinda stuck) so I can't really clean it, and no, I haven't been able to try any more pellets than that because Walmart doesn't stock em and since Amazon and eBay don't really have any acceptable prices for pellets. I'm not sure I can convice my dad to order from Pyramyd. I'm just having to work with what I've got locally, for the most part. I have looked through the forum for accuracy reports, but it's been a month or so and from what I remember there wasn't much to be had for 25 yards.
It has a 2 screw trigger mod, power adjuster, 6.5" TKO, two coils cut from the hammer (believe that's the right term) spring, and a second barrel band. Core group was from about 1850psi to 1150psi. Yes, I have a chrony, and have been using it for every group I've shot with it so far. I am guessing the guy that had it before me tuned it, but I'm not sure what pellets he used. Also, I just shot another group with it just now and got a .9" group with about 20 shots (the ones that were within 4%). I'm shooting the pellets from 760 to 790fps.
To get the TKO off you may have to place an open end wrench over the barrel and make sure it fits snug up against the TKO and wack it (the Wrench) with a heavy object to pop it off, mine fit tight also. A 7/16" wrench or a Metric just a little bigger than the barrel will work.
William
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Mid to high 700 FPS may be to slow for the pellet, mine shoots JSB's at 850 to 940 the best (15.9 grain). You will have to go through the tuning stage yourself until you find what you want in groups and FPE. The Crosmans shoot ok in my 2 Discos but not as good as JSB.
Good luck and happy shooting, it will come around just a little fiddling around and it will drive tacks at 35 yards.
William
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I shot a string starting at 2000psi over the chrono and shots 18-42 were all between 765 and 790fps, so why should I only be shooting 12-15 shots? That's well within 4%
I may possibly be able to get a 250 pack of each JSB from eBay or Amazon to try. I'll see if I can make it happen...
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Mid to high 700 FPS may be to slow for the pellet, mine shoots JSB's at 850 to 940 the best (15.9 grain). You will have to go through the tuning stage yourself until you find what you want in groups and FPE. The Crosmans shoot ok in my 2 Discos but not as good as JSB.
Good luck and happy shooting, it will come around just a little fiddling around and it will drive tacks at 35 yards.
William
I'll see about trying that later, but I really wanted at least 20 shots per fill since I'm pumping it every time. I'll tell you, the groups I was getting between 720 and 750 were absolutely HORRID! Somewhere around 2-2.5".
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I shot a string starting at 2000psi over the chrono and shots 18-42 were all between 765 and 790fps, so why should I only be shooting 12-15 shots? That's well within 4%
I may possibly be able to get a 250 pack of each JSB from eBay or Amazon to try. I'll see if I can make it happen...
Not sure how your getting that many shots, I guess due to the Lower FPS tune. Ok looking back on my lower tunes I was getting a lot of shots also, but now I have it set up high so I get lower shot count. I get 30 shots with the double tube Disco on high power, sorry about that.
Anyway, I understand the Pellet deal in getting them, So as a nice guy that I am, (not what my wife says though lol) PM me your address and I will send you a half Tins of JSB-15.9 and some H&N pellets for you to play with on grouping. There should be over 200 of the JSB's in 15.9 grain.
I will send them out on Monday USPS, these are the last of a few tins I dont use, although I do use the JSB 15.9 always I have some to spare ;D
William
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Thanks, PM sent. I'll work on it some more tonight to see if I can get the groups to tighten up a little bit better.
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Thanks, PM sent. I'll work on it some more tonight to see if I can get the groups to tighten up a little bit better.
Your Welcome, glad to help. I sure remember when I was growing up and wanted things and my Dad didn't understand why I wanted them, he always told me to make due with what I had lol
Besides I am only paying back what others have done for me over the years ;D
Enjoy your Disco, I love mine, I went through the same thing your going through and I finally worked it out and now I have 2 that drive tacks if i do my part, well sometimes the tack has to be a little bigger on my bad days lol
William
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I will chime in with some more encouragement. It sounds like you know a good amount to get yourself going here.
Just decide what you want the gun from: hunting/pest, plinking, field target, etc.
Then you can tweak to your heart's desire. Even if you have a bad crown on your barrel, there is a home remedy that could easily fix it before looking into purchasing another barrel.
Enjoy and keep posting with questions.
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I may have found something! While checking screws, I found that all 4 screws on the 2 barrel bands were slightly loose. I was able to snug up all of them about an 1/8 or so turn. I'll update once I shoot some groups.
Also, does anyone know if a long probe or flow through bolt is worth getting? I was debating whether to try one and see if it makes any difference since they are just $12 from Mellon Air.
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Also, does anyone know if a long probe or flow through bolt is worth getting? I was debating whether to try one and see if it makes any difference since they are just $12 from Mellon Air.
I had a flow through bolt probe on mine, I don't think mine came from mellonair, and it blew the end off the probe when I was shooting. I imagine others have not had this problem and maybe mine had a weak spot in it. I cant say I noticed any serious increase in FPS while it lasted, though it has been quite some time since this happened.
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Ok, just shot another group and accuracy wasn't any better. Here is something that might be a clue though. I'm not quite sure what to make of that vertical string. All shots in that group were from 765-785fps. The POI shouldn't have shifted that much just from a 20fps difference, right? Ideas anyone? Is this just a coincidence?
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Ok, just shot another group and accuracy wasn't any better. Here is something that might be a clue though. I'm not quite sure what to make of that vertical string. All shots in that group were from 765-785fps. The POI shouldn't have shifted that much just from a 20fps difference, right? Ideas anyone? Is this just a coincidence?
Could be the scope, barrel bands, or pellets. You did chrony it so thats not the problem. Make sure you gun rest is good and solid and make sure screws are tight on scope. I say different pellet may show better grouping. When you get some JSB's on Wednesday or Thursday that will tell you of maybe what to expect.. ;D
William
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My Discovery is the first and only Crosman product that hates Crosman pellets! All over the place! I was ready to throw the gun in the trash after I broke it over my knee! Then I found JSB 18 grain pellets. Stacks those! Another pellet that is easily obtainable believe it or not actually shoots OK is a Daisy hollow point. I find that strange. My barrel bands cannot be tightened totally because I won't be able to attach the pump nozzle. I used soda can aluminum to wedge between the barrel and band to get it snug but will still move. Good luck it was a very frustrating gun but shooting lazers now. What the Disco really needs is a fill valve that slants down because the TKO addition makes it very difficult to stabilize the barrel.
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Here is the link for the soda can fix for the barrel bands. Not everyone does it, it really just depends, but it will help with the space available for the fill: http://www.tko22.com/info.html (http://www.tko22.com/info.html)
I agree that you shouldn't make any judgments until you've tried 3 or 4 different types of pellets. The JSB 18s are pretty much lasers in mine as well. I've tried a bunch. Crosmans are ok, but even higher end pellets spray like you're showing. It just depends.
Not a fan of the flow-through bolt. I have the extended bolt from Mellon. It didn't add any real FPS, but it did give the string more consistency. The point is to really get the pellet engaged in the rifling prior to the shot.
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Ok, just shot another group and accuracy wasn't any better. Here is something that might be a clue though. I'm not quite sure what to make of that vertical string. All shots in that group were from 765-785fps. The POI shouldn't have shifted that much just from a 20fps difference, right? Ideas anyone? Is this just a coincidence?
What distance are you shooting?
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Unless specified otherwise, all shots are at 25 yards.
At this point, I think the best course of action is to wait for my other pellets to arrive (can't thank you enough William ;D) and try all of those. Almost every accuracy test that I had seen showed that the Discovery liked Crosman Premiers, so I guess that's why I jumped the gun in assuming it was the gun(combined the fact that I wanted it to shoot pellets that I could get cheap and locally).
About the Daisy HP, I went through the same deal with those when I was testing my 880. It absolutely sprayed every other pellet I tried everywhere at 15 yards, but practically stacked the Daisy Hollowpoints, so that's all I use in it now. I wasn't aware they made them in .22, though. It might be worth a look at Cabelas next time I there.
About tightening the barrel bands, I haven't had any issue with filling it after I tightened them up. The space available is a little tighter but nothing unmanageable.
Thanks for the bolt advice. I may get the extended probe once the birthday money comes in next month.
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BTW, the pellets were canned CPUM 14.3s; I tried CPHPs but they did even worse......
Sounds like you know what you are doing but just for info, I had the same problem with CHP and I tried about 8 different pellets. For me, the Air Arms 13.43 stack pellets in the same hole at 25 yards. The CHP's shot like your pics. Also, I put a Challenger adjuster on mine, cut a new Disco spring down and screwed it back to get approx 790 fps out of mine so I could dial it in for Hunter FT to 19 FPE ( yeah, not the high end FT rifle most people use but it's what I have) HFT requires less than 20 FPE. I fill to 1700 (after figuring out the best flat curve) and get about 25 shots before poi comes off target.
Hope this helps.
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BTW, the pellets were canned CPUM 14.3s; I tried CPHPs but they did even worse......
Sounds like you know what you are doing but just for info, I had the same problem with CHP and I tried about 8 different pellets. For me, the Air Arms 13.43 stack pellets in the same hole at 25 yards. The CHP's shot like your pics. Also, I put a Challenger adjuster on mine, cut a new Disco spring down and screwed it back to get approx 790 fps out of mine so I could dial it in for Hunter FT to 19 FPE ( yeah, not the high end FT rifle most people use but it's what I have) HFT requires less than 20 FPE. I fill to 1700 (after figuring out the best flat curve) and get about 25 shots before poi comes off target.
Hope this helps.
Thanks, that sounds almost exactly like how I want to tune mine; not for FT though, my end goal was starlings at as long a range as I could squeeze out of it: hopefully 60 yards or more. Also, after playing with it some more, the gun has now decided it doesn't want to get up to speed until 1700psi and doesn't go back down until about 1050psi. No setting that I have changed that I'm aware of, just seems that the gun hasn't been used in a while and is sort of breaking in again.
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If you want to check out the link at the bottom of my gun list. All i shoot are cphp for plinking and polymags for hunting.
Good Luck I hope it helps
Tom
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Alright, William's generous pellet donation came in today! I just got back from shooting and here are the results from 25 yards:
JSB Exact 15.9gr gave by far the best results at .9" ctc for a 10 shot group,
JSB Exact 14.3gr was the next best at 1.4" for a 10 shot group, while
Beeman FTS copper 14.72gr gave almost identical results, yielding a 1.45" 10 shot group, but
H&N Field Target Special 14.66gr and Barracuda Match 21.1gr fell far behind giving a 2.4" 5 shot group and a 2.8" 3 shot group, respectively.
Overall, I am very pleased with the performance of the JSB 15.9gr pellets and believe the JSB 14.3gr and the Beeman FTS warrant a closer look. There was a 4-5mph wind that was off and on throughout the testing, but I tried to time the shots between gusts. I also didn't have a great rest, either: just a cardboard box and some blankets stacked on top, braced off the door frame. I believe that with a better rest, a calmer day, and a calmer shooter I can probably tighten the JSB 15.9s down to at least 3/4" and maybe even 1/2" at 25 yards.
I believe the next course of action is to see if I might be able to get a small can of JSB 18.1s to try, then I'll know where to go from there.
I'll be doing more testing with the JSB 15.9gr at varying ranges over the next few days, so watch for updates!
ETA: after shooting some more 15.9s right before dark when the wind died down, I fired off one last 8 shot group. I pulled one shot a little, and there were 2 flyers which I believe were caused by slightly damaged skirts. The group (excluding the one I pulled) measured 7/8", with the good 5 shots measuring 1/2". I now think I may stick with 15.9s unless I get a chance at some 18.1s, and they manage to group a little better.
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The JSB 15.89 gr is my HUNTING pellet. I like it so much, it is in second place too. lol
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Alright, William's generous pellet donation came in today! I just got back from shooting and here are the results from 25 yards:
JSB Exact 15.9gr gave by far the best results at .9" ctc for a 10 shot group,
JSB Exact 14.3gr was the next best at 1.4" for a 10 shot group, while
Beeman FTS copper 14.72gr gave almost identical results, yielding a 1.45" 10 shot group, but
H&N Field Target Special 14.66gr and Barracuda Match 21.1gr fell far behind giving a 2.4" 5 shot group and a 2.8" 3 shot group, respectively.
Overall, I am very pleased with the performance of the JSB 15.9gr pellets and believe the JSB 14.3gr and the Beeman FTS warrant a closer look. There was a 4-5mph wind that was off and on throughout the testing, but I tried to time the shots between gusts. I also didn't have a great rest, either: just a cardboard box and some blankets stacked on top, braced off the door frame. I believe that with a better rest, a calmer day, and a calmer shooter I can probably tighten the JSB 15.9s down to at least 3/4" and maybe even 1/2" at 25 yards.
I believe the next course of action is to see if I might be able to get a small can of JSB 18.1s to try, then I'll know where to go from there.
I'll be doing more testing with the JSB 15.9gr at varying ranges over the next few days, so watch for updates!
ETA: after shooting some more 15.9s right before dark when the wind died down, I fired off one last 8 shot group. I pulled one shot a little, and there were 2 flyers which I believe were caused by slightly damaged skirts. The group (excluding the one I pulled) measured 7/8", with the good 5 shots measuring 1/2". I now think I may stick with 15.9s unless I get a chance at some 18.1s, and they manage to group a little better.
Them 15.9 JSB and 18.1 will shoot about the same groups in size, I had some 18.1 grain and wish I would have sent you a few to test. Those 15.9 are the best in my guns, I was out shooting yesterday and shot some 18.1 and 25.4 grain and they all shoot decent groups, but the 15.9 beat the pants off the others. I bet you that if you increase the FPS on that gun a little it will group them better. Mine seem to like 825 fps to 940 fps.
Glad those are working out.... I love the 15.9 JSB
William
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Alright, William's generous pellet donation came in today! I just got back from shooting and here are the results from 25 yards:
JSB Exact 15.9gr gave by far the best results at .9" ctc for a 10 shot group,
JSB Exact 14.3gr was the next best at 1.4" for a 10 shot group, while
Beeman FTS copper 14.72gr gave almost identical results, yielding a 1.45" 10 shot group, but
H&N Field Target Special 14.66gr and Barracuda Match 21.1gr fell far behind giving a 2.4" 5 shot group and a 2.8" 3 shot group, respectively.
Overall, I am very pleased with the performance of the JSB 15.9gr pellets and believe the JSB 14.3gr and the Beeman FTS warrant a closer look. There was a 4-5mph wind that was off and on throughout the testing, but I tried to time the shots between gusts. I also didn't have a great rest, either: just a cardboard box and some blankets stacked on top, braced off the door frame. I believe that with a better rest, a calmer day, and a calmer shooter I can probably tighten the JSB 15.9s down to at least 3/4" and maybe even 1/2" at 25 yards.
I believe the next course of action is to see if I might be able to get a small can of JSB 18.1s to try, then I'll know where to go from there.
I'll be doing more testing with the JSB 15.9gr at varying ranges over the next few days, so watch for updates!
ETA: after shooting some more 15.9s right before dark when the wind died down, I fired off one last 8 shot group. I pulled one shot a little, and there were 2 flyers which I believe were caused by slightly damaged skirts. The group (excluding the one I pulled) measured 7/8", with the good 5 shots measuring 1/2". I now think I may stick with 15.9s unless I get a chance at some 18.1s, and they manage to group a little better.
Them 15.9 JSB and 18.1 will shoot about the same groups in size, I had some 18.1 grain and wish I would have sent you a few to test. Those 15.9 are the best in my guns, I was out shooting yesterday and shot some 18.1 and 25.4 grain and they all shoot decent groups, but the 15.9 beat the pants off the others. I bet you that if you increase the FPS on that gun a little it will group them better. Mine seem to like 825 fps to 940 fps.
Glad those are working out.... I love the 15.9 JSB
William
I think I'll try to order a 500ct can of 15.9s and maybe a 250ct of 18.1s from Pyramyd. I'm going to try and play with velocity some and see just how well I can get them to group when I turn it up some. I chronied the string and over 9 shots(1st gave an error) the velocity went up from 709 to 725fps with a standard deviation of 5.5fps and a spread of 16fps. ;D I can't wait to get this tuned and introduced to some starlings!
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I also liked the FTS copper plated, but they just don't seem to always group tight, sometimes you would shoot 5 inside a dime and then sometimes it would scatter a few. At one point I was thinking they may be my first choice, but, just to many fliers.
I had one other pellet that surprised me and that was the 13.43 grain JSBs, I could stack them at 30 yards at times, but they are a little light and sometimes fussy. I have tried almost every pellet out there and the best pellet has always been anything in the JSB line.
Have fun and happy shooting, it will all come together just give it time, it sure took me awhile, trigger work, barrel work and plenty of pellet testing at different FPS.
William
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If your going to leave it shooting in 700s fps range . Try the JSB express 14.3 . I have several discos that shoot in 700s fps and they shoot dime size groups at 50 yards. But I clean my barrels with corrosionx and the groups are smaller with a newly cleaned barrel .
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Managed to do a little more testing this evening, but the conditions weren't as favorable as they were yesterday. I shots about 40 15.9s at 50 yards and was getting about 2" 10 shot groups. I tinkered with velocity some, but found that 800fps was about as accurate as 720fps, but the accuracy really dropped off below 700. I finally settled at about 730fps, but I may change it slightly once I get to the weekend. I was more jittery today and didn't focus as much on these groups and the wind was more constant today, so I believe that under better conditions I could get it down to 1"-1.5" 10 shot groups at 50.
I put it to the old coke can test for 65 yards and after taking about 5 sighters, I figured out my holdover and was able to get 75% or more of my shots to connect, with most of the misses being my fault.
Also Brian, the 14.3gr Exacts in my picture above were the Express. The can says Exact Jumbo Express on it.
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I tried messing with velocity for the FTTs yesterday evening, and while they did better they still were nowhere near the JSB's accuracy. After tinkering with the 15.9s some more, I have found they seem to like a little bit higher velocity than what I've been shooting them at. I'm going to try groups at different velocities today and see what happens. Hopefully I don't run out of pellets before I get done testing ;D, but if I do I have a shopping cart ready at Pyramyd. I've got 3 cans of 15.9s and 1 can of 18.1s, coming in right around $50 shipped with a 10% off code. My dad told me that after this, Santa isn't going to be too generous this year :o
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I tried messing with velocity for the FTTs yesterday evening, and while they did better they still were nowhere near the JSB's accuracy. After tinkering with the 15.9s some more, I have found they seem to like a little bit higher velocity than what I've been shooting them at. I'm going to try groups at different velocities today and see what happens. Hopefully I don't run out of pellets before I get done testing ;D, but if I do I have a shopping cart ready at Pyramyd. I've got 3 cans of 15.9s and 1 can of 18.1s, coming in right around $50 shipped with a 10% off code. My dad told me that after this, Santa isn't going to be too generous this year :o
I got my first job at 11 throwing newspapers. At 13 I was a short order cook. :) It taught me to work for what I wanted. Maybe dad will give you a few extra jobs to do to earn the cash to support your addiction. :)
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I don't know if someone mentioned this, but you don't need to take the TKO off to clean the barrel. I saw in a review and have tried it myself. Placing a regular drinking straw in the brake covers the baffles and prevents them from being damaged while cleaning.
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So after doing some more testing this morning, here is what I've gotten for 25 yards. The top left group is with velocities around 680fps and the bottom was adjusting the scope with the velocity between 730-740fps. The top right group is 5 shots at 730-740fps; 3 went into 1 ragged hole, and the other 2 landed beside each other a little over half an inch away. I'm down to 25 pellets, so I'm going to try and get those others ordered tonight.
I think some of these fliers are caused by slightly dented skirts and the fact that my scope is non-AO. I would swap the scope out for one with AO, but that would mean losing the handy little bubble level inside the one I'm using, and I believe it's doing more good for me than an AO would.
Also, something cool I noticed while I was shooting was that the cardinals under my bird feeders didn't seem to care one bit about my shooting, even though they were only maybe 30 degrees and 15 yards away from where I was. They would've scrambled and been gone for 5-10 minutes had I been shooting my Prowler...
I finally just went ahead and tried cleaning it without removing the TKO, and since I wasn't using a very large or tight patch it didn't do any damage to it. If I can find a straw I'll try and see if I can do that next time.
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My disco was my fist pcp. I will say that working on the trigger is what ultimately tightened my group. I used the three screw mod, less than $5 total, and a little time to make sure it is safe. That was all I needed.
I would recommend doing some trigger work before burning through more pellets.
I shoot my JSB 18s around 700. It is a little slow, but I get 35 shots per fill within a 4% spread.
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http://www.gatewaytoairguns.org/GTA/index.php?topic=31208.0 (http://www.gatewaytoairguns.org/GTA/index.php?topic=31208.0)
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About half down the page is a picture of the leade on a barrel that needed it taken down to feed the pellets right, many Crosman barrels need a little work.
http://www.gatewaytoairguns.org/GTA/index.php?topic=71442.0 (http://www.gatewaytoairguns.org/GTA/index.php?topic=71442.0)
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An A.O scope is much more important than a bubble level in my opinion. You can align the crosshairs with the horizon, but you can't estimate parallax.
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On my first Disco the groups tightened up when I began to lube my pellets with the mix recommended by BB Pelletier ( Tom Gaylord ). Hoppes gun oil mixed with motor honey, I drip some on the sponge in an empty tin and roll them around. My new Disco seems to like them dry. The other thing that helped tighten groups was a lighter trigger return spring which I got by cutting down a spring from an ink pen. I move the rifle less when I have a lite trigger pull, but please be sure your rifle is safe if you change anything inside the trigger group.
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My disco was my fist pcp. I will say that working on the trigger is what ultimately tightened my group. I used the three screw mod, less than $5 total, and a little time to make sure it is safe. That was all I needed.
I would recommend doing some trigger work before burning through more pellets.
Mine already has the 2 screw mod, and I don't believe that I'm having any bad shots because of the trigger. If it ever starts posing a problem, instead of doing any more work to it I think I'd just replace it with a Mrod trigger.
About half down the page is a picture of the leade on a barrel that needed it taken down to feed the pellets right, many Crosman barrels need a little work.
http://www.gatewaytoairguns.org/GTA/index.php?topic=71442.0 (http://www.gatewaytoairguns.org/GTA/index.php?topic=71442.0)
I don't think mine has this problem because I don't notice any roughness when loading a pellet. The FTT's do catch, but no other pellet that I've tried does that. Actually, my 880 does the best with the pellets that are hardest to load. I have been considering using some JB paste to clean it, though. I may still take it apart to check the barrel, but I don't want to take it apart if I don't have to. For one thing, I'm worried I may strip the breech screw like many others have (I've stripped enough screws before to know to be afraid of it).
An A.O scope is much more important than a bubble level in my opinion. You can align the crosshairs with the horizon, but you can't estimate parallax.
I may try an AO scope, but I've found that a lot of times when I think the scope is level, I look and can't even see the bubble because it's so far off to the side. I never really had an issue with my Prowler while using a non-AO, but nevertheless I guess it's worth a shot. I just dread having to rezero the scope I have on it right now, because the tracking on it is terrible (sometimes it moves a little bit with one click, sometimes it moves 2x as much, and sometimes it takes 3-4 shots before it settles down to where it's supposed to go.)
I believe that my accuracy issue at this point is the pellets I'm using have skirts that are slightly dented, and I believe if I get a new can with more uniform skirts they will do better. In any case, I will have to order more pellets before I can try anything else.
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I had worries about dented skirts. But many guys on here told me that the Disco has enough power that upon firing, the pressure of the air actually spreads the skirt out in the barrel and solves the dented issue.
I think misformed pellet heads are more concerning.
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Good post. I'm not a PCP shooter (yet ;)) but I would suggest carefully flaring the skirts of your JSB pellets. You can use the cap of a Bic pen--the ones with the clear barrel. I picked up about 40 fps with 13.4 gr AA pellets in my Diana 48 doing this.
Scotty
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An A.O scope is much more important than a bubble level in my opinion. You can align the crosshairs with the horizon, but you can't estimate parallax.
I may try an AO scope, but I've found that a lot of times when I think the scope is level, I look and can't even see the bubble because it's so far off to the side. I never really had an issue with my Prowler while using a non-AO, but nevertheless I guess it's worth a shot. I just dread having to rezero the scope I have on it right now, because the tracking on it is terrible (sometimes it moves a little bit with one click, sometimes it moves 2x as much, and sometimes it takes 3-4 shots before it settles down to where it's supposed to go.)
Try tapping the turrent after each adjustment. I use the plastic handle (non marring) of my pocket knife. This will help some scopes respond to the adjustments.
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Good advice, Andy; I second that suggestion. An officer at the local Sheriff's Department Range told me about that many years ago - and IT WORKS!
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An A.O scope is much more important than a bubble level in my opinion. You can align the crosshairs with the horizon, but you can't estimate parallax.
I may try an AO scope, but I've found that a lot of times when I think the scope is level, I look and can't even see the bubble because it's so far off to the side. I never really had an issue with my Prowler while using a non-AO, but nevertheless I guess it's worth a shot. I just dread having to rezero the scope I have on it right now, because the tracking on it is terrible (sometimes it moves a little bit with one click, sometimes it moves 2x as much, and sometimes it takes 3-4 shots before it settles down to where it's supposed to go.)
Try tapping the turrent after each adjustment. I use the plastic handle (non marring) of my pocket knife. This will help some scopes respond to the adjustments.
Thanks for the advice, I'll try that when I get to fine tune the scope.
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Just placed my first order with Pyramyd Air. I have 1500 15.9 JSBs and 500 18.1s supposed to be here Friday. All total, it came in at $50.26 with $8 shipping and a 10% off code.
ETA: Aaaannd it's already off to a bad start. They put it on hold because they "couldn't verify billing address". What the heck is that supposed to mean?!? The billing address was the same as the shipping address, except for the name. Has anyone else had this issue?
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On some web sites everything has to match. Name on credit card has to match the name on the shipping address. Not sure about Pyramid but I have had that happen before when I was shipping something to my girlfriend.
I'd call them in the morning and get it resolved.
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I've already sent an email; hopefully they see it in time for it to be shipped tomorrow. I've never had a problem before when ordering something, so I just find it a little strange that they would do something like that. I wish I could just cancel the order and redo it, but I don't see that option anywhere.
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I believe that my accuracy issue at this point is the pellets I'm using have skirts that are slightly dented, and I believe if I get a new can with more uniform skirts they will do better. In any case, I will have to order more pellets before I can try anything else.
I have used the bolt knob to straighten bent skirts just before loading.
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I believe that my accuracy issue at this point is the pellets I'm using have skirts that are slightly dented, and I believe if I get a new can with more uniform skirts they will do better. In any case, I will have to order more pellets before I can try anything else.
I have used the bolt knob to straighten bent skirts just before loading.
I'll try that when I shoot the rest of the ones I have. I didn't have a pen to use before, but I do happen to have a bolt handle laying around here somewhere ;). Speaking of bolt handles, I'm going to have to blue loctite mine; it keeps spinning loose when I cock it and rubs the skin on my finger raw if I shoot too many at one sitting. I forgot to do that the other night like I meant to.
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Your shipping order may not get shipped when the name on the card and name on the address do not match, the purpose of that is, is when the bank computer reads it it must match. Some sites like Walmart have another option to choose a different shipping address, but not many have that option.
Hope you get it straightened out, also I use a ink pen sometimes to straighten out the skirts just remove or cut off enough of the writing end to allow it to fit correctly.
Good luck and happy shooting
William
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First Blood!!!
http://www.gatewaytoairguns.org/GTA/index.php?topic=95680.new#new (http://www.gatewaytoairguns.org/GTA/index.php?topic=95680.new#new)
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If I were you, I would call them and verify your ordering information. I had that happen with AgDepot and waited a week and nothing. I finally called to straighten it out. Just saying that if you are anxiously waiting...T
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Alright, it now shows ready for shipping. Customer service saw my email and responded back that "the order was approved and will begin the shipping process". I'm sure glad that it got cleared up, but may have delayed shipping by a day. I don't guess it really makes much of a difference, though.
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Coon #2, and just in the nick of time!
http://www.gatewaytoairguns.org/GTA/index.php?topic=96003.0 (http://www.gatewaytoairguns.org/GTA/index.php?topic=96003.0)
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My pellets came today, but naturally almost as soon as I sat down to shoot it started pouring. I also picked up a can of Piranhas from Walmart, so I'm curious to see how those shoot. I'll try to get some testing done tomorrow once the weather gets better.
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My pellets came today, but naturally almost as soon as I sat down to shoot it started pouring. I also picked up a can of Piranhas from Walmart, so I'm curious to see how those shoot. I'll try to get some testing done tomorrow once the weather gets better.
WWWWhatttt!!!! You mean to tell me you dont have an umbrella and a flash light :o
Ok, that's it, I am now taking Emergency donations for Umbrella's and flash light's, we can't have a situation like this happen again ::)
Well I guess due to the catastrophe (an event causing great and often sudden damage or suffering; a disaster.) I guess we will have to hope for a better outcome tomorrow!
Good luck, happy shooting ;D
William
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I just shot a group of 15.9s and am pleased with the results. I cleaned the barrel last night and it took about 25 or so shots to finally get it leaded back enough to shoot accurately. After it got leaded back, it started doing ragged hole groups from 25 yards. The fliers in this group were leading shots and the shot to the left of the group was my fault. If I had pulled the trigger at the right point, it would've been right in the middle of the rest of the group. I'm thinking that center group was about 6-7 shots.
In other news, there was a dove and a squirrel sitting beside each other in a tree about 35 yards away from me in the general direction of the target, so I shot towards the target and neither one of them even flinched. Hopefully the starlings do the same.
Interestingly, the group size between the old can and the new can was similar, but the POI shifted up a decent amount.
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Just went back outside and saw this on the chronograph. Hats off to whatever flew through it while I was gone ;D
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Ah ha - I see that you are "Cereal Killer". ;D ;D
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That's impressive
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Thanks. I'm going to try 40 yards once this rain goes away. It's been raining and soaking my cereal box targets most of the morning, so I haven't had a chance to get anything else done.
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I just got done trying 40 yards and the gun and I are shooting 1" or less 5 shot groups. It appears to me that I may need to lower my starting pressure to 1600psi, though I'll need to do more testing. I wasn't able to hold very steady, so I think it'll probably do more like .75" or less. The first group measured 2.5", the second measured 1", and the third was 3 shots measuring about .65"
The flier in the last group was a VERY bad pulled shot on my part and I'm amazed it even came that close. The gun went off just as I was getting a view of the target.
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I just got done trying 40 yards and the gun and I are shooting 1" or less 5 shot groups. It appears to me that I may need to lower my starting pressure to 1600psi, though I'll need to do more testing. I wasn't able to hold very steady, so I think it'll probably do more like .75" or less. The first group measured 2.5", the second measured 1", and the third was 3 shots measuring about .65"
The flier in the last group was a VERY bad pulled shot on my part and I'm amazed it even came that close. The gun went off just as I was getting a view of the target.
What is the FPS now? Did you put the new Hammer Spring in or are still using the old one?
William
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I am still using the old spring for now, but am going to try the new spring when I try to figure out how the gun likes the 18.1s. They weren't as accurate as the 15.9s at lower velocities. My shot string is from about 730-750fps, but I still have to check my shot count later.
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Just did some more shooting tonight and have finally truly realized my 25 yard goal and had an epiphany as well. I swapped a bipod off a PB and put on the Disco for a steady platform that wouldn't shift between shots. With JSB 15.9s, the gun is now capable of ragged hole groups at 25 yards! I have determined that I have a shot count of 20-25 shots from about 720-745fps, though I'll need to do some more testing to determine exactly how many.
The epiphany was this: it finally hit me just how much I need an AO scope to truly realize this gun's potential. I was testing the parallax error and it was somewhere in the neighborhood of 1.5" at 25 yards! My next purchase towards this gun will most likely be a Tasco 2.5-10x44 mildot AO scope. If anyone has any other scope suggestions though, I am open them. Only issue being that it needs to be $50-60 or less :o. I'll have to deal with the scope that's on it until mid-September when I'll have a little birthday money to use.
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The group on the left was general testing without thinking about parallax, the group in the middle was trying to keep the gun and myself in the same position for every shot, and by the time the group on the right was being shot, the hardwood floor was getting really uncomfortable so I wasn't able to focus on the parallax at all. Anyway, I'm calling a .5" 5 shot group @ 25 yards the potential of my setup under perfect conditions.
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That's great Little Siege. Glad you got a good shooter. And you're making it even better.
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That's great Little Siege. Glad you got a good shooter. And you're making it even better.
Thanks! After seeing the amount of parallax error from that scope, I think I am beginning to realize why the person I bought it from said his best groups were out to 40 yards max. I'm finally starting to figure out just how critical an AO is to accuracy in this sport.
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Looking good, you keep it up and I am going to have to make you an offer for that Disco ;D
Once you get a good scope and get to were you can really steady the Disco you will find that it will shoot just as good at 40 yards I think!
Good luck and keep us posted...
William
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I just got done shooting a 5 shot group at 60 yards to find out my holdover and got this! I'm not sure if this is just a fluke or what, but this gun just keeps impressing me more and more every day. The flier was one that I shot with a 3-4mph crosswind so I could get an idea of windage.
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I just got done shooting a 5 shot group at 60 yards to find out my holdover and got this! I'm not sure if this is just a fluke or what, but this gun just keeps impressing me more and more every day. The flier was one that I shot with a 3-4mph crosswind so I could get an idea of windage.
Nice shooting, I see you and that Disco are starting to get along very well with those 15.9 JSB's ;D
William
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I just got done shooting a 5 shot group at 60 yards to find out my holdover and got this! I'm not sure if this is just a fluke or what, but this gun just keeps impressing me more and more every day. The flier was one that I shot with a 3-4mph crosswind so I could get an idea of windage.
Nice shooting, I see you and that Disco are starting to get along very well with those 15.9 JSB's ;D
William
I would never have believed I would be getting these kinds of groups when I first got it, and it just seems to be getting better and better each time I shoot it! I also only had the scope magnification set to 6.5x, so I believe it could do even better once I get an AO scope and crank it on up to 10x. I can't wait to get a good scope so I can finally learn my gun's true potential!
Also, I'll give a report for anyone who reads this thread later: I am shooting from ~1700psi (1400psi on the pump gauge, which I believe registers about 300psi lower than the gun's; I'll test it sometime later on and update if necessary) down to 1000psi and am getting somewhere in the neighborhood of 25 shots per fill (will need to test when I go to the trouble of setting up the chrono again) with my shot string starting at approx. 710fps and peaking at approx. 745fps.
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I would never have believed I would be getting these kinds of groups when I first got it, and it just seems to be getting better and better each time I shoot it! I also only had the scope magnification set to 6.5x, so I believe it could do even better once I get an AO scope and crank it on up to 10x. I can't wait to get a good scope so I can finally learn my gun's true potential!
Also, I'll give a report for anyone who reads this thread later: I am shooting from ~1700psi (1400psi on the pump gauge, which I believe registers about 300psi lower than the gun's; I'll test it sometime later on and update if necessary) down to 1000psi and am getting somewhere in the neighborhood of 25 shots per fill (will need to test when I go to the trouble of setting up the chrono again) with my shot string starting at approx. 710fps and peaking at approx. 745fps.
Sounds like you got that Disco rockin'. Nice job with it.