GTA
Airguns by Make and Model => Benjamin Airguns => Topic started by: tkerrigan on April 10, 2016, 02:29:56 AM
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About 6 months ago, I shot a string with 104.25 DWC, they look like trashcans. The string was as follows in my Bulldog.
3100psi fill 782, 809, 827, 831, 831, 818, 808, 797, 779, 761 2050psi ending. Highest was 160ft lbs
Tonight the following after drilling the ports out to .277" and the hammer spring tightened
3200psi fill 886, 922, 954, 957, 944, 928, 908, 881, 886 1900psi ending. Highest was 212 ft lbs. I'll search up some heavier ammo tomorrow and see what the ft lbs goes to. Regards, Tom
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Thats a big jump in velocity from a tp enlargement & spring tension increase.
Seems it's now making use of a lot more air too, What was the port size before?
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The valve port was .204" and the barrel port was .220", the .277" is just under 75% of bore size. Regards, Tom
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You would think that with all the money Crosman has put into releasing this rifle they would know that air passages work best when they taper from the valve to the barrel . Not the other way around .
Either way nice work getting that rifle breathing better. How's the accuracy?
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It's just the receiver-air tube-barrel assembled right now, I'll do the rest in a day or two. Regards, Tom
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Those are nice velocities how is the accuracy on your BD with this ammo?
Hope all works out like you want her to Brother.
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Tom, I sent you an email.
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Yesterday I finished up, polished the bore and the lead in. All I have to do is mount a scope today. Regards, Tom
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OK, through the Bulldog, today I shot 1 161.3gr RN .713 long at 826fps for 244fpe, 4 185gr spitzer .915 long at 711fps for 208fpe and a 5/8" group at 50 yards, that is excellent because I am a bit wobbly, 5 231.5gr spitzer HP's 1.075 long at 652fps for 219fpe and a 1.5" group. I have the mold for the first bullet so I will get a group later. Regards, Tom
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Interested to see how it shoots at 100 yards.
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Could I get a diagram of which ports you drilled?
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Remove the barrel. About 3/4" from the fill nipple there is a setscrew that will bleed the air out of the bottle, then unscrew the bottle, pull the cocking handle back, drill down through the rear barrel setscrew opening, you can see the air valve through it, then drill the barrel. Be very careful and square everything up. Here is a drawing of the gun
https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF (https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF)
Regards, Tom
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Thanks Tom, I'll give that a try.
I'm rebuilding and adding onto the factory baffle system right now. So the gun is already halfway apart anyway.
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Wow, I might be new to the air gun works but I can see how that would be a huge restriction.
One other thing I would like to ask about. I've
been doing my own gunsmith for over a decade and one of the things I do on my rifles is ream the throat. What I mean is that on this barrel the rifling starts very abruptly. Would it not be a benefit to make then start gradually?
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I did saw a slit in the end of a piece of 5/16" wooden dowel and ran some 1000 grit sand paper with a battery powered drill about 10 seconds each way in the throat. Don't know if it did any good, but it looks shiny. Regards, Tom
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Tom, did your bulldog have a sleeve in the receiver? Mine has a plastic tube between the barrel and the valve. Diameter of about .302.
I think I should leave that out, if I don't it will have the same restriction as before.
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If mine had one I drilled right through it, I was looking into the air valve so as to not drill too far, so there could have been one. The hole I drilled measured .275" so could have drilled right through it if there. I'll check next time apart. You could try drilling with it in there, air would go smoother without a .312 part of the passage. What I did was put a bit that just fit with stock ports and clamped the receiver so that the bit went up and down with out drag using a drill press. Then put the J bit in and did the deed. That way you know you are lined up perfect. If I had to do it with a hand drill, I would step it up one size at a time. Be very careful, the hole ends up being about 1/32" from the poppet seal area. What is the ID of that plastic sleeve? Regards, Tom
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It is about .198is
I've already drilled the holes by squaring it up in the mill.
It's soft plastic and was just spinning in the receiver when I tried to drill.
I'm going to leave it out for now. Will probably have to make one from brass because plastic will just crumple of I try to it to that size..
How much did you tighten the the pilot to increase spring tension?
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Remove the barrel. About 3/4" from the fill nipple there is a setscrew that will bleed the air out of the bottle, then unscrew the bottle, pull the cocking handle back, drill down through the rear barrel setscrew opening, you can see the air valve through it, then drill the barrel. Be very careful and square everything up. Here is a drawing of the gun
https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF (https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF)
Regards, Tom
The Benjamin exploded drawing above doesn't show the plastic tube and I went out and looked on my milling machine, no plastic swarf, so it must not have had one. Maybe they are made different now. Or could it have come from a different country? You can tighten the hammer spring until you feel it stop. It may or may not be at coil bind, the plastic spring guide is pretty long and I may try shortening it a bit and see if it tightens more. I backed the spring off a turn and it lost quite a bit of speed, so you can use it all. 2800psi is the best pressure for power. Regards, Tom
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Weird stuff. I doubt it came from over seas. I found this one in a pawn shop. I think it ran Tennessee.
I'm still a day or two away from finishing my baffle project. But I'll get the chrono out and try these mods out ASAP.
Thanks for the help! I REALLY appreciate it.
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You can shoot it with just the receiver barrel and air tube by pushing on the trigger thingee. You probably already know that.
Regards, Tom
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Roger that! But thanks for mentioning it.
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Hi Tom,
I finished my mods to the the Bulldog yesterday and got it put back together but was too late to do any chrony work. Mine also had the Delrin sleeve in it and I just took it out. To retain it would take some pretty delicate work and it didn't seem to affect anything. I ran some 81 gr JSB MKIIs across the chrony today and using 2 turns of preload on the spring and a starting pressure of 2900 psi it ran 920, 970,970, 969, 956 and finished at 2250 psi. I have some other heavier cast bullets to try and see how they do. The Bulldog now has a bite.
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Great, you can keep turning the spring until it stops, and pick up a bunch more speed. Regards, Tom
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That was exactly the result that I was looking for. I can dial in the velocity as needed per bullet since the striker preload is so easy to get to. Thanks for your advice on the mods.
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i finished mine today. i'll try to get a string shot put together today. Last night in my shed i did 3 shots.
started with 790fps and 3rd shot was 820fps. With Mr. Hollowpoints that weigh 143g thats 213.6 Ft/lbs of energy. up from the 177 ft/lbs that i got before.
Super excited to go varmit hunting saturday night.
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OK, had a afternoon off with enough time to run to the range.
Here are my numbers
first string with 143 grain mr. hollow point.
Spring turned in all the way or about 4.5 turns in from stock.
Starting at about 2900psi ending at about 1600psi
826.1
852.9
858.3
846.9
827.0
804.6
789.5
769.4
749.1
729.7
With 95g hp from air venturi
Starting at about 2900 ending at dangit I forgot to look.
983.9
999.2
987.8
957.9
930.8
937.4
907.0
891.7
861.3
829.2
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Man, those slugs are moving right along. Good job. Regards, Tom
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Nice 5-shot string with the 143gr....
Bob
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How's the quiet coming along? Regards, Tom
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I'm at 83 db. I need a depinger really bad but can't find one and dont really understand how they work well enough to build my own.
I think the ping is 83 db because no matter where I place the meter I still get 83. Under gun on ground. In front of muzzle. On the bench next to me.
I set it in the chrono and it said 81
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The are basically a baffle that fits inside the air reservoir and interrupts the sound wave formed by the valve closing to keep it from bouncing around inside the reservoir, causing the "ping".... They have a couple of problems, which would be worse on a big-bore.... They work better if they have a relatively small hole in them, and if placed too close to the valve, they will reduce the power by decreasing the air pressure in the valve during the shot.... In addition, they tend to creep backwards inside the reservoir towards the valve because of the pressure difference across them during the shot, so need to be anchored somehow to prevent that.... One other thing that can (and has) happened, is that if they are not structurally strong enough, they can come apart, and the pieces can plug the valve, which may mean you think the gun is empty but it still has air in it.... Disassembly under this condition could be fatal.... In the incident I am thinking about, it wasn't, but it blew the reservoir end cap through the ceiling, and left the owner deaf for a few days....
Bob
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Could the tank itself not be surrounded in a sound deadening material such as dynomat?
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Is there room for it when the housings are on? Anything that would stop a bell from ringing would probably work. Maybe even narrow strips of dynomat with hose clamps tightened around them. Regards, Tom
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I'll pick some up today but it will probably be a few days before i can get it on.
What about the spring inside? is that something that makes noise? I hear about changing some rod or pin on the marauder that makes less noise. Is that aplicable
Oh and as a side note, i am not using an actual DB meter, just an app on my phone. But i had a reference DB of 108-110 before i began experimenting
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Was your reference DB from before the power upgrade? Might be more of a reduction than it appears. Regards, Tom
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Reference DB was before any mods at all. I have turned the power back down and it is 1db quieter. for reference i have a 300 blkout that is one of the quietest rifles i've ever shot and it is only 81 - 82 db
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I have tried about every way a man can try to get accurate DB readings so I will tell you The best way I have found. Put your gun in its firing position and have it ready to fire place your DB meter to the side about 3 feet then cover the DB meter with a folded towl make sure its(DB meter) both to the side and behind the muzzle.
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Hey, if any of you guys make a replacement sleeve with larger ID for the poly in the transfer port, please check FPS before and just after installing it. Be nice to know if it's worth making one. My gun doesn't have one but a friend's does and I've been advising him on the bore job and he is wondering about it. I don't think it will make much difference, but it would be nice to know. I'll make him one if it does. Regards, Tom
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OK I'm super excited to report that I got my sound deadening material on today and shot the gun 3 times tonight in my Back yard. 76,77,77db.
I still have a loud spring noise in the stock, but I'm not knowledgeable enough to go further.
Here is a pic of where I placed the material. All I had was a 10x11" piece so I made the best use of it I could think of.
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A polyurethane tube inside the reservoir works very well to dampen the vibration in the reservoir & eliminate the ping. That's the route I'd have gone.
But if it works well enough for you I see no reason to not go the route you took.
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Most of the ping noise is gone. most of what i hear now is more of a spring "boing" noise.
If i took a video and posted it to youtube would yall listen to it and give me recommendations?
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If we could hear it I am sure we would.
But that spring isn't very long or stiff so I wonder if you are mistaking the noise for that when it may well be something else.
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https://youtu.be/ysHGFuCD9tk
After hearing it on camera. It does sound like a ping. Any helpful ideas would be appreciated.
We had to get the camera pretty close to hear it.
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its PING for sure. I hear it all the time in the shop on customer guns maybe I should make a 3d depinger like I did for the Mrods.
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I'll take one.
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Definitely ping
the polyurethane tube in the reservoir will deaden that ping without doubt. it doesn't affect the performance of shot count either.
But if after that you are still hearing anything similar to it, then I'd look at that thin plastic housing on the gun since it could be that spent air from the shot is causing it to resonate. If thats the case then a thin layer of spray on foam inside it should remedy the issue.
Or the alternative option is you could learn to live with it like a lot of us do ;D
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Mod90, i am interested in the tube and will look into that.
The ping is certainly not the plastic housing but the aluminum tube did have some resonate coming from it. The dynomat pad took care of that. You can actually feel the difference in vibration in your fingertips when you fire it.
And "getting used to it" as you say is a very good possibility. It is already so much quieter than it was, its incredible.
The wide angle lens of the camera makes it hard to understand how close the camera is but my wife literally had to hold it withing 2 to 3 inches to be able to hear the ping on camera. at 3 feet away you couldn't hear it well.
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Here is a short video of the first shot I took. But my wife was about 3.5 to 4 fit away.
It really hits home on how quiet it is when you hear me cock the gun
https://youtu.be/MEoWbAesSJg
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I had my Bulldog apart yesterday and tried removing the valve spring. Went from 896fps to 925fps with 127gr Hunters Supply bullets. Took it to 241fp, I did 5 shots and no problem. I'm leaving it out. Regards, Tom
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Awesome find Tom.
Any problem filling from a completely empty reservoir? Like having to hold the gun upright or barrel down?
mine wont fill from empty without the gun cocked.
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Yes, just hold it barrel up, might be difficult if pumping. Works golden with HPA. Might be able to turn the hammer spring out a bit and get a nice curve. I'll try that tonight or tomorrow. Regards, Tom
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This thread has been a fountain of info for sure. it sounds like the gun is fairly simple to take apart and apply deadening material around the tank. Opening up the ports a bit sounds a little tricky but I did it on my QB78 without too much trouble. I very much like the 5 shot bell curves you guys are getting too.
wll2506
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I had my Bulldog apart yesterday and tried removing the valve spring. Went from 896fps to 925fps with 127gr Hunters Supply bullets. Took it to 241fp, I did 5 shots and no problem. I'm leaving it out. Regards, Tom
Where did you get your Dynomat ? Is it a brand or ? I saw it and it is very very expensive where I checked. What is it normally used for and how thick is it ?
Thank you,
wll2506
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I had my Bulldog apart yesterday and tried removing the valve spring. Went from 896fps to 925fps with 127gr Hunters Supply bullets. Took it to 241fp, I did 5 shots and no problem. I'm leaving it out. Regards, Tom
Where did you get your Dynomat ? Is it a brand or ? I saw it and it is very very expensive where I checked. What is it normally used for and how thick is it ?
Thank you,
wll2506
You can get some Dynamat at most automotive or car audio stores.
I had some a long time ago for a customer that had a loud industrial system in residential zone and we needed to keep the noise down.
That stuff works great but it does cost some real $$$, I believe it was about 1/8" to 5/32" think if I remember right.
http://www.dynamat.com/automotive-and-transportation/car-audio/dynamat-xtreme/ (http://www.dynamat.com/automotive-and-transportation/car-audio/dynamat-xtreme/)
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I had my Bulldog apart yesterday and tried removing the valve spring. Went from 896fps to 925fps with 127gr Hunters Supply bullets. Took it to 241fp, I did 5 shots and no problem. I'm leaving it out. Regards, Tom
Where did you get your Dynomat ? Is it a brand or ? I saw it and it is very very expensive where I checked. What is it normally used for and how thick is it ?
Thank you,
wll2506
You can get some Dynamat at most automotive or car audio stores.
I had some a long time ago for a customer that had a loud industrial system in residential zone and we needed to keep the noise down.
That stuff works great but it does cost some real $$$, I believe it was about 1/8" to 5/32" think if I remember right.
http://www.dynamat.com/automotive-and-transportation/car-audio/dynamat-xtreme/ (http://www.dynamat.com/automotive-and-transportation/car-audio/dynamat-xtreme/)
I found a substitute that is made of the same material ...5 sqft for $12.00 and free shipping. I just bought a pack !
wll2506
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Nice and you saved a ton of cash too :D
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You got a link to that stuff, i want some more
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This is what I got ... I hope it works ;- )
http://www.ebay.com/itm/BULK-5-sqft-6-x6-70mil-BUTYL-Car-Sound-Deadener-Insulation-Free-Dynamat-Sample-/172241264661?hash=item281a612015:g:Oh8AAOSwMNxXYCyr (http://www.ebay.com/itm/BULK-5-sqft-6-x6-70mil-BUTYL-Car-Sound-Deadener-Insulation-Free-Dynamat-Sample-/172241264661?hash=item281a612015:g:Oh8AAOSwMNxXYCyr)
wll2506
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awesome, good luck i bet it will work great
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Remove the barrel. About 3/4" from the fill nipple there is a setscrew that will bleed the air out of the bottle, then unscrew the bottle, pull the cocking handle back, drill down through the rear barrel setscrew opening, you can see the air valve through it, then drill the barrel. Be very careful and square everything up. Here is a drawing of the gun
https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF (https://www.crosman.com/fileuploader/download/download/?d=0&file=custom%2Fupload%2FBPBD3SRT_EVP.PDF)
Regards, Tom
I'm going to do this mod, I will drill a .250 hole. just because, because.
I assume you remove the total barrel frame unit out of the gun and then clamp this completed unit down and drill through after removing the top set screw ? Did you run into any problems or things I should watch out for? I plan on getting a .204 drill and use that as a guide and then put in a .250 drill and go from there. I assume the frame is pot metal ?
After removing the stock screws did the frame and barrel come out pretty easily ?
I'm worried about going to far and destroying the gun, if you know what I mean !!!
wll2506
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Yes, empty and remove the bottle and the valve stem, then you can look into the air valve and you should notice that the hole you will be drilling is very close the the sealing line of the poppet. Just make sure you drill straight down and don't go through the seal line. .250 should work well, I think mine is .275 or so. If you leave the valve spring out you will gain another 35fps or so. Regards, Tom
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Almost forgot, Just remove the breech end set screw, the other one will keep it lined up. Regards, Tom
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hey tom i just want to thank you for all the great info on the bulldog mod. Awhile back i googled on. power tune a bulldog and it linkes to your post and i read up and got brave and i took the gun apart crossed my fingers and keep reading back and forth on your stuff and making sure i was doing just the way u said i drilled both port and barrel .275 tightened hammer spring all the way. And man wat a totally difrent gun!! I love it now and wouldent ever want it stock agin ! As Matter a fackt i put the drill bit i used uo in the bulldogs stuff cause the next one i order will get the same thing done to it before it even gets shot lol . now im a member i just want say thanks agin .
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You're welcome, this is the easiest gun I've ever worked on. You may have already done this, removing the air valve spring between the air cylinder and the receiver will add another 30 or 40 fps. That might give problems if filling with a hand pump. Might have to use shop air to seal the valve then use the pump. With out the spring, rifle must be aimed up and cocked. Regards, Tom
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Changed up the look, tune (port, valve work, depinger, lcd and carbon fiber shroud). Some chrony testing tomorrow.
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Cool, only one observation, bipod mounted to the barrel doesnt work too good.
You are limiting the natural harmonics of the barrel, most of the times it gives erratic grouping.
Marko
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Cool, only one observation, bipod mounted to the barrel doesn't work too good.
You are limiting the natural harmonics of the barrel, most of the times it gives erratic grouping.
Marko
So very true............Carl
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Added noise deadner and mover the bipod to the stock.
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Added noise deadner and mover the bipod to the stock.
Have you noticed any accuracy changes with cutting down the trapezoid shroud/rail? I'm not a real fan of how the full length trapezoid shroud aligns to the barrel, but wondering how you locked it down for such a short section.
Yea, this gun needs a serious depinger! I have a cross-flow depinger from a Mrod that has been opened up and larger O-rings to fit the bulldog, but haven't tried it yet.
Mine is de-tuned for pellet use 130FPE. No plans for any big game shooting, but noticed flooding on my creek trails, so the beavers are back. Maybe it is time for first blood with the BD? :D (NYS DEC Permitted)
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Changed up the look, tune (port, valve work, depinger, lcd and carbon fiber shroud). Some chrony testing tomorrow.
Removing the shroud makes the rifle look so much better!
Taso
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Changed up the look, tune (port, valve work, depinger, lcd and carbon fiber shroud). Some chrony testing tomorrow.
Removing the shroud makes the rifle look so much better!
Taso
X2! Very nice!
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Hey guys, I have been building alot of parts for the bulldog and am working on a de-pinger now.
Tom, and maybe a few other people, would any one like to test them for me?
Not everyone wants or needs the regulators i built but for the guys that don't the depinger is a big help.
I have 3 test ones printed out and so if anyone wants one please e-mail me at pitbullairguns@gmail.com
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Ok all 3 are spoken for. I'll let y'all know how they did
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Hey Matt! Are you working on a standard stock or do you know of anyone who is?
Thanks,
Taso
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No sir, I do not. It's probably something your going to have to have built by a stock builder.
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No sir, I do not. It's probably something your going to have to have built by a stock builder.
Thank you!
Taso
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Are you working on a standard stock or do you know of anyone who is?
I have given that idea some thought, but still more than I'd like to tackle. To make it a rifle would require some sort of trigger mechanism change and a way to mount a stock lug to the action, along with a custom made stock and a rail added to top of receiver.
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very informative post,will be doing these power mods,as for its looks,it grows on ya,this is my first bull pup type rifle,i really like the feel,shoots great,am still wanting a slayer if they ever get some more made. ;D
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update, did the power mod,s at 9/32 on barrel and valve,left the valve spring out,cleaned and polished all,ran a exact 35 cal threw barrel no damage passing thru the barrel, filled to 200bar,shot 5 slugs thru,without barrel cover, ya it's a lot louder,and stronger,slung some 150 gr led,did not crony it yet,but could tell by the impact and damage to the bullet she,s right about where i want her,also tightened hammer spring to tight,then backed off 2 turns.once my mega ldc gets here will be able to crony,and will post some spec,s,thanks again all for the info, ;D
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I've got a Bulldog on the way. Curious about how it seems to only have a stable velocity for the first 5 shots, and am wondering if a regulator would give more consistent velocity (even if lower), for a couple of mags. Especially with an extended air tube a la Pitbull but at the factory air pressure. Also, I've been reading about the accuracy of this rifle... and am wondering if I'll shoot it when I get it and then return it because I cannot abide an inaccurate rifle. I would expect this should shoot inch groups at 50 yards with the right diameter projectiles.
Also wondering if the opening of the air port and the resultant high velocity and reported better accuracy is because the barrel twist is too slow for the available projectiles (bullets), and that's why the JSB 81gr Kings seem to shoot better (higher velocity -> faster spin rate -> sufficiently stabilized).
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got the mega ldc installed, did some shooting today,decided to use some 360 round balls i use in my 357 rain storm 2 and my 357 shinsung 201 fire,a little tight but very doable, and accurate,there 64 gr, shot ten passed the crony,
start fill 3000 psi #1 1043 fps hammer spring out 2 full turns from full in
#2 1047 fps
#3 1017 fps
#4 1009 fps
#5 1006 fps
#6 1001 fps
#7 976 fps
#8 964 fps
#9 946 fps
#10 930 fps
ending pressure 1800 psi
very pleased with the accuracy, the mod,s and even [just stock] it's a winner,i have many different bullets/slugs to try,at 70 yards it will chop small diameter limb,s with the round ball,s every time if i do my part ,that's great because they're cheap to plink and target practice with at 52.00 or so shipped for 800 or so is a great alternative .i was surprised at the accuracy of the round ball,the bulldog barrel is .356 and the rb,s are .360, i shot a lot more today at limb,s and other targets today tethered to my tanks i have regulated to 3k , shot 1 of my full 4500 psi tank,s down to 2700 psi,i will refill it from my [ tuxin compressor from china,it's fast and works great so far now, i have 2 92 cu ft cf tanks ,and the bulldog is quite now,you hear the impact of the bullet more than the shot,neighbors did not seem to hear anything,no dog,s barking,so i'm very content with the bulldog.hope the review helps, i know the post people have made about the bulldog mod,s and stuff really helped me,also the mega ldc and the single shot tray are well worth the money,very impressed with pittbullairguns.com .
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good deal your gun is making some serous power!
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ObiJohn, I agree with you. I think the larger bullets need to be spun a little faster to be accurate. They can also be over spun but i don't think that we have to worry about tht on anything except pellets.
Supertech, Glad to hear you like the Moderator.
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ObiJohn, I agree with you. I think the larger bullets need to be spun a little faster to be accurate. They can also be over spun but i don't think that we have to worry about tht on anything except pellets.
Supertech, Glad to hear you like the Moderator.
like it? i love it,,also i made some more 158 gr, bullets i will try this weekend,unless the atn 5x20x[35]x85mm day/night digital scope, gets in so i can do some night shooting,great deal on them at sportsman outfitters ,549.00 shipped, also best deal i found on the extended battery pack was 97.00 shipped from amazon,glad i got the moderator so the gun won't cost less than the optic,s lol.will move the monstrom 4x16x44 ffp to the rainstorm 2. merry Christmas to me,
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I apologize for going off topic but I just looked for that ATN scope and it looks like sportsmansoutfitters is selling them $40 cheaper on their ebay store. If it's the same company. You have to add it to your Ebay cart to see the price and I've attached a screen shot.
SuperTech77, maybe you can ask them to pricematch themselves and refund your $40 bucks back?
Sorry for going OT but I thought it was important to point out.
Taso
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Santa came early here
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I apologize for going off topic but I just looked for that ATN scope and it looks like sportsmansoutfitters is selling them $40 cheaper on their ebay store. If it's the same company. You have to add it to your Ebay cart to see the price and I've attached a screen shot.
SuperTech77, maybe you can ask them to pricematch themselves and refund your $40 bucks back?
Sorry for going OT but I thought it was important to point out.
Taso
thanks i will give it a try.
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Hey, if any of you guys make a replacement sleeve with larger ID for the poly in the transfer port, please check FPS before and just after installing it. Be nice to know if it's worth making one. My gun doesn't have one but a friend's does and I've been advising him on the bore job and he is wondering about it. I don't think it will make much difference, but it would be nice to know. I'll make him one if it does. Regards, Tom
Got the SS valve in and started testing.
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Awesome! i'm really looking forward to what you get from that.
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I have a few questions: what is the diameter of the barrel, what is the width of the receiver where the barrel is (wall thickness), and does the barrel have a straight profile, or is it tapered? For some reason I feel like I read somewhere that the barrel is tapered.
Tons of info on this thread!! Keep it up, I'm taking notes!
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I have a few questions: what is the diameter of the barrel, what is the width of the receiver where the barrel is (wall thickness), and does the barrel have a straight profile, or is it tapered? For some reason I feel like I read somewhere that the barrel is tapered.
The barrel is straight at the receiver, then tapers down, and then straight again to the muzzle. Search on bulldog barrel. Someone did post the dimensions on GTA.
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The 3" that goes into the breech is 11/16", then tapers to 5/8" in 3" and is 5/8" to the muzzle. 28" total length. Regards, Tom
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Very good info gents, I thank you!
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Good info guys, couple questions if anyone can help me out. I have heard the accuracy on these isn't too good at 100-150yds or further, what king of accuracy are you getting out of a power tuned Bulldog with say 115-125gr slugs?
Is there anyone that make a moderator for these yet?
Thanks in advance
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Good info guys, couple questions if anyone can help me out. I have heard the accuracy on these isn't too good at 100-150yds or further, what king of accuracy are you getting out of a power tuned Bulldog with say 115-125gr slugs?
Is there anyone that make a moderator for these yet?
Thanks in advance
The only commercial LDC's I know of are from Matt @ Pittbull: https://www.pitbullairguns.com/ (https://www.pitbullairguns.com/)
I think he has three size options and some that are designed to work with extended air tubes.
I only shoot pellets, so can't help you on the slug info.
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Good info guys, couple questions if anyone can help me out. I have heard the accuracy on these isn't too good at 100-150yds or further, what king of accuracy are you getting out of a power tuned Bulldog with say 115-125gr slugs?
Is there anyone that make a moderator for these yet?
Thanks in advance
The only commercial LDC's I know of are from Matt @ Pittbull:
I think he has three size options and some that are designed to work with extended air tubes.
I only shoot pellets, so can't help you on the slug info.
Thanks I'll check him out.