GTA

All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: Ken13 on December 04, 2017, 06:42:35 PM

Title: Gamo Urban Groups (updated info)
Post by: Ken13 on December 04, 2017, 06:42:35 PM
This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.

 https://imgur.com/gallery/DjJP3

So got some JSB 18.1s in today, finally, so out I went. Again, 33 yards and all shots from a bench. I don't have a Chrony so Idk what my sbot string looks like, but I do 30 shots, from 3k psi to 1k. 30 shots, three 10 shot groups. But these groups surprised me. I don't know what's up with those 3 weird shots from the CPHP, but it wouldve been great if not for those. The 15.9 JSBs are good..then the 18.1s...wow.
Airgun groups. 33 yards https://imgur.com/gallery/TjKbF
Title: Re: Gamo Urban Groups.
Post by: CraigH on December 04, 2017, 06:55:27 PM
Excellent group!

Replace the phillips head trigg adjusting screw behind the trigger with a slightly longer one - 2.5mmX8mm - or possibly a 2.5mmX10mm machine screw.   I had to check a few stores - many only go down to 3mm or 4mm.   And in that diameter I had to get a slotted head.   I will find a socket head screw later.
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 04, 2017, 07:06:39 PM
Excellent group!

Replace the phillips head trigg adjusting screw behind the trigger with a slightly longer one - 2.5mmX8mm - or possibly a 2.5mmX10mm machine screw.   I had to check a few stores - many only go down to 3mm or 4mm.   And in that diameter I had to get a slotted head.   I will find a socket head screw later.
Great, thanks! I wasn't sure about the size. & That one I pulled  is bothering me though  ::) coulda shoulda woulda been covered by a dime.
Title: Re: Gamo Urban Groups.
Post by: Trigger_Finger on December 04, 2017, 07:34:27 PM
Excellent group!

Replace the phillips head trigg adjusting screw behind the trigger with a slightly longer one - 2.5mmX8mm - or possibly a 2.5mmX10mm machine screw.   I had to check a few stores - many only go down to 3mm or 4mm.   And in that diameter I had to get a slotted head.   I will find a socket head screw later.


Try the model airplane shops.
Title: Re: Gamo Urban Groups.
Post by: Talan on December 04, 2017, 07:42:36 PM
Can't help you with the trigger adjust, just wanted to say, that's a darn good group.  My wife and I also have urbans and our groups are very much like yours.
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 04, 2017, 07:53:17 PM
Can't help you with the trigger adjust, just wanted to say, that's a darn good group.  My wife and I also have urbans and our groups are very much like yours.

Thanks! Great guns, aren't they. I'm enamored with mine haha.
Title: Re: Gamo Urban Groups.
Post by: LeE on December 04, 2017, 08:10:40 PM
That Urban is definitely a keeper, well done!
Title: Re: Gamo Urban Groups.
Post by: toddbrat on December 04, 2017, 09:57:40 PM
They are great guns and that is a nice group. I'm hoping that my increased cost in pellets now will be offset by my decreased cost in targets--and I see you're doing the same :)

It is awesome when a long string can be covered by one sticker. Also, I replaced the screw in mine a couple of weeks ago and it has really made a huge difference. The creep is gone and it is a solid, predictable break every time. If mine was used to hunt I would have left it, but only using it as a prone/bench gun in the backyard, I wanted it as light crisp as possible. 
Title: Re: Gamo Urban Groups.
Post by: Edtampa on December 04, 2017, 10:06:34 PM
This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.
 https://imgur.com/gallery/DjJP3

Go to a heavier pellet like the JSB 18.1. The Urban likes them heavy at least mine does. I got great groups with the JSB 15.89 but even better with the 18.1.
Title: Re: Gamo Urban Groups.
Post by: MB on December 04, 2017, 11:18:20 PM
Great Guns, Great Shooting, best thing I did to mine was add the CDT GRT 4 Trigger

First one JSB 14.35 - 28 Yards

Second CPD 14.3 - 28 Yards
Title: Re: Gamo Urban Groups.
Post by: kzz1kaw on December 05, 2017, 03:39:48 AM
All good groups. If you can back it up to 50 and see if you have a good urban I posted awhile back on my 50 groups covered by a dime jsb 14.35😎. This was my second urban. The first one I got shot great out to 30 our to 50 different story 1” groupings some touching some not. Sent it back sent out replacement. This urban is keeper. I believe if a good barrel and the shooter can get 1/2” or less at 50, it’s a keeper otherwise I return it till I get a good one😉
Title: Re: Gamo Urban Groups.
Post by: avator on December 05, 2017, 07:03:00 AM
This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.
 https://imgur.com/gallery/DjJP3

Go to a heavier pellet like the JSB 18.1. The Urban likes them heavy at least mine does. I got great groups with the JSB 15.89 but even better with the 18.1.
Agree 100%. This is 10 shots at a measured 35 yds. with EunJin 28.5 domes.
Title: Re: Gamo Urban Groups.
Post by: jimmykay on December 05, 2017, 10:41:53 AM
Excellent groups!!!
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 05, 2017, 11:15:05 AM

This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.
 https://imgur.com/gallery/DjJP3

Go to a heavier pellet like the JSB 18.1. The Urban likes them heavy at least mine does. I got great groups with the JSB 15.89 but even better with the 18.1.
Gotcha! Just ordered some 18.1s. I've also seen it shoot very well with those Predator GTO pellets. And they're only 11 grain. Wondering if I should try those too.
Title: Re: Gamo Urban Groups.
Post by: agorena123 on December 05, 2017, 11:28:39 AM
I'm limited to 20 yards in my backyard and basically getting one ragged hole with CPHP,s but then will get an oddball flyer in every other grouping I'm blaming on the pellet.  Ordering some JSBs here shortly and hoping to get on a buddy's property where we can stretch out the distance.
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 05, 2017, 11:36:33 AM
I'm limited to 20 yards in my backyard and basically getting one ragged hole with CPHP,s but then will get an oddball flyer in every other grouping I'm blaming on the pellet.  Ordering some JSBs here shortly and hoping to get on a buddy's property where we can stretch out the distance.
What distance are you planning? I'm limited to those 33.
Title: Re: Gamo Urban Groups.
Post by: agorena123 on December 05, 2017, 01:23:49 PM
I'm limited to 20 yards in my backyard and basically getting one ragged hole with CPHP,s but then will get an oddball flyer in every other grouping I'm blaming on the pellet.  Ordering some JSBs here shortly and hoping to get on a buddy's property where we can stretch out the distance.
What distance are you planning? I'm limited to those 33.

35 and 50, with the CPHPs, domed and JSBs 18.1s to see how she does using bench and bags
Title: Re: Gamo Urban Groups.
Post by: Edtampa on December 05, 2017, 07:21:48 PM
This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.
 https://imgur.com/gallery/DjJP3

Go to a heavier pellet like the JSB 18.1. The Urban likes them heavy at least mine does. I got great groups with the JSB 15.89 but even better with the 18.1.
Agree 100%. This is 10 shots at a measured 35 yds. with EunJin 28.5 domes.

What kind of FPS are you getting with the EunJin 28.5 domes?
Title: Re: Gamo Urban Groups.
Post by: gamoshooter on December 05, 2017, 09:04:40 PM

   I really like my urban  pretty good pcp for the price

  Lightweight  quiet  and most of all accurate  ;D ;D

  35 yds  predator  gto  lead free  (non toxic lol )

 Gamoshooter
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 05, 2017, 09:11:25 PM

   I really like my urban  pretty good pcp for the price

  Lightweight  quiet  and most of all accurate  ;D ;D

  35 yds  predator  gto  lead free  (non toxic lol )

 Gamoshooter
Have you shot with those father than 35?
Title: Re: Gamo Urban Groups.
Post by: gamoshooter on December 05, 2017, 10:07:38 PM


  Shot them at 50 and group opened up just a bit  I think they are a bit light for 50 yds

 Going to try the air arms and barracuda match at 50 and see how it likes lead pellets vs gto s

 At 50  most predator pellets seem to shoot well at shorter distances for me for whatever reason

 Gamoshooter
Title: Re: Gamo Urban Groups.
Post by: Ken13 on December 05, 2017, 10:56:47 PM


  Shot them at 50 and group opened up just a bit  I think they are a bit light for 50 yds

 Going to try the air arms and barracuda match at 50 and see how it likes lead pellets vs gto s

 At 50  most predator pellets seem to shoot well at shorter distances for me for whatever reason

 Gamoshooter
How much did they open up?
Title: Re: Gamo Urban Groups.
Post by: avator on December 06, 2017, 08:05:38 AM
This is just over 33 Yards. 10 shot group using JSB 15.9s.  I haven't tried any other pellet but I feel like this is pretty satisfactory group . I unfortunately pulled 1 shot. The trigger is light but long. I read here you can shorten the 2nd stage by replacing a screw, but I don't remember exactly what it entailed. Can someone help me out?  ;D.
 https://imgur.com/gallery/DjJP3

Go to a heavier pellet like the JSB 18.1. The Urban likes them heavy at least mine does. I got great groups with the JSB 15.89 but even better with the 18.1.
Agree 100%. This is 10 shots at a measured 35 yds. with EunJin 28.5 domes.

What kind of FPS are you getting with the EunJin 28.5 domes?
I haven't even run it over the chrono yet.
Title: Re: Gamo Urban Groups.
Post by: skorec on December 06, 2017, 08:56:09 AM

   I really like my urban  pretty good pcp for the price

  Lightweight  quiet  and most of all accurate  ;D ;D

  35 yds  predator  gto  lead free  (non toxic lol )

 Gamoshooter

Unbelievable accuracy for lead free.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 07, 2017, 06:21:42 PM
Any other pellet recommendations. I don't think it likes the heavier stuff   ;D
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 07, 2017, 09:00:51 PM
Have you tried jsb 14.35 mine loves them out to 50 less than dime size group benched no wind the magic pill for my urban. This is my second urban btw. First one shot great out to 30 then the groups opened up out to 50 so I returned it got a nuther haven’t look back since. Keeper now😉
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 07, 2017, 09:11:59 PM
Have you tried jsb 14.35 mine loves them out to 50 less than dime size group benched no wind the magic pill for my urban. This is my second urban btw. First one shot great out to 30 then the groups opened up out to 50 so I returned it got a nuther haven’t look back since. Keeper now😉
Ah yes, I forgot about the Diabolo express. I'll order those next. Thanks 👍
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 07, 2017, 10:16:43 PM
Mine really likes the H&N FTT in 5.53 head size.
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 07, 2017, 10:31:07 PM
Mine really likes the H&N FTT in 5.53 head size.
How far out have you shot the urban with ftt
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 07, 2017, 10:40:45 PM
Mine really likes the H&N FTT in 5.53 head size.
How far out have you shot the urban with ftt
+1
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 08, 2017, 10:29:55 AM
Here's a 30 shot string I did a couple of weeks ago at my far target, 63 yards using the FTT. I have mine turned all the way down, about 13 turns on the power adjuster if I remember correctly, and only fill to 2k psi. With that setup, I get 30 fairly consistent shots shooting down to about 1200-1250psi. They average about 660 fps for just over 14FPE. Groups were much tighter before I turned it down, I'll have to see if I can find the pics from then. I turned it down simply to use less air, I fill from a SCUBA tank and can get over 100 fills with this setup vs about 15 leaving it turned up. The low shot was right after the fill, I've found if I open the bolt while filling I don't have that odd ball. The upper left shots were all me, I just pulled them. I shoot off a bipod with a rear bag (a sock full of rice). Also, pretty sure I had my scope at 6X that day. Probably more info than you needed but wanted to give some context and let you know I'm shooting way slower than most others. 
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 08, 2017, 11:06:33 AM
Here's a 30 shot string I did a couple of weeks ago at my far target, 63 yards using the FTT. I have mine turned all the way down, about 13 turns on the power adjuster if I remember correctly, and only fill to 2k psi. With that setup, I get 30 fairly consistent shots shooting down to about 1200-1250psi. They average about 660 fps for just over 14FPE. Groups were much tighter before I turned it down, I'll have to see if I can find the pics from then. I turned it down simply to use less air, I fill from a SCUBA tank and can get over 100 fills with this setup vs about 15 leaving it turned up. The low shot was right after the fill, I've found if I open the bolt while filling I don't have that odd ball. The upper left shots were all me, I just pulled them. I shoot off a bipod with a rear bag (a sock full of rice). Also, pretty sure I had my scope at 6X that day. Probably more info than you needed but wanted to give some context and let you know I'm shooting way slower than most others.
Any info is appreciated! What made you want to turn down the power, other than getting more fills from your tank?
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 08, 2017, 11:58:15 AM
Seeing if I could use a lower fill and how many shots it would give me was the #1 goal, I've got a Benji hand pump and it really isn't bad to pump to 2800psi. I tried a few different setups and in the end, this one worked out perfectly. I could honestly use the exercise, but when I get a chance to sneak out back for a couple of hours, I'd rather shoot than pump :) Plus, I don't hunt, just punch paper.

One of my other enjoyments is long-range shooting, which I don't get to do much of anymore, and this setup actually does a very good job of simulating a .308 at 300 yards ballistics wise with a 29 yard zero on the Urban and 100 on the .308. Drop and drift are very similar--within a couple of inches. 300 isn't very far, but at least it helps keep the form and mechanics in usable order.
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 08, 2017, 04:06:48 PM
Had time for 1 quick magazine on lunch today, and danged if there wasn't one outlier in each and they were both the last shots of the strings so more than likely they were me. Here's the 50 yard target, 4 out of 5 in .88 inches, and the 63 yard, 4 out of 5 in 1.5 inches. You can ignore the data on the images, didn't take the time to clean it up and change it but the measurements are correct. 
Title: Re: Gamo Urban Groups (updated info)
Post by: skorec on December 11, 2017, 03:33:12 AM
Todd -  YES, rifle shooting distances are 50+
Why did you shot at so low velocity. Short barrel PCPs like 800-900 FPS.
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 11, 2017, 04:39:45 AM
Todd -  YES, rifle shooting distances are 50+
Why did you shot at so low velocity. Short barrel PCPs like 800-900 FPS.
+1 do you have a chrony? Try some jsb 14.35 is the magic pill for my urban. I did  try h&n ftt don’t remember the head size. They shot ok not like the jsb covered with a dime😳😎 Did not have at the time of testing the other two head sizes will have to do another test at 50 now that I have all three.
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 11, 2017, 10:24:11 AM
Todd -  YES, rifle shooting distances are 50+
Why did you shot at so low velocity. Short barrel PCPs like 800-900 FPS.

My reason was laziness. I have a hand pump and SCUBA tank. With the power turned up, it really needs the higher pressure to shoot well, at least from what little testing I had a chance to do. When using my SCUBA tank to fill, that would only give me around 14-15 fills before I would need to either top off with my hand pump or just use the pump only. With reducing the power, I'm able to reduce the needed fill pressure to start at only 2000psi. That will give me over 100 fills from my tank. I'm enjoying it this way, but it is challenging when the wind picks up. I'm lucky that most of my wind is usually a headwind, very few crosswinds so it does make doping easier, just aim a bit higher. However, when they swirl, it is very challenging. While I like to be as accurate as possible and shoot groups as tight as possible, especially at my far target, I can live with groups around 1.5 inches as I don't shoot competitively, only for fun in the backyard. With that being said, I'm thinking of adding a carbon fiber tank after the first of the year, and if I do the power will be turned back up for sure as I won't have to conserve air as much to avoid pumping.

+1 do you have a chrony? Try some jsb 14.35 is the magic pill for my urban. I did  try h&n ftt don’t remember the head size. They shot ok not like the jsb covered with a dime😳😎 Did not have at the time of testing the other two head sizes will have to do another test at 50 now that I have all three.

I've been using ChronoConnect on my phone and ChairGun. I'm getting pretty close based on the math, at least for my purposes. I'm building a chrony based on an Arduino board, have the frame and code done just haven't found the time to wire it up.  Across the 30 shots I get from my fill, I'm averaging about 660fps for just over 14FPE. Don't remember the ES off hand, but it is tight enough to not see much drop if I do my part. I'm going to add some JSB's in my next order, I've gone through 2 tins of H&N in the last month by not pumping :)
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 11, 2017, 10:38:57 AM
After seeing all these excellent groups, I'm convinced I have a lemon!  Here's my best at 35 yards, rested, sitting, no wind...  The JSB's are 15.9 gr.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 11, 2017, 11:03:15 AM
After seeing all these excellent groups, I'm convinced I have a lemon!  Here's my best at 35 yards, rested, sitting, no wind...  The JSB's are 15.9 gr.
Unfortunately so, don't give up on the Urban though, as you can see they can be quite the shooter  ;D
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 11, 2017, 11:09:00 AM
Agreed. Here's a group at 50 yards from before I dropped the power. The flier was my fault.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 11, 2017, 11:18:35 AM
Agreed. Here's a group at 50 yards from before I dropped the power. The flier was my fault.
That's better than my 33 yard group. I want to try 50 but I feel like I'd just make a mess of it haha
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 11, 2017, 04:13:20 PM
Agreed. Here's a group at 50 yards from before I dropped the power. The flier was my fault.
That’s a good group! Keeper
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 11, 2017, 04:20:25 PM
What are you guys getting for velocities?
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 11, 2017, 04:30:00 PM
I’m regulated shooting low 800’s
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 11, 2017, 06:43:20 PM
I’m regulated shooting low 800’s
What was it shooting before you regulated it?
Title: Re: Gamo Urban Groups (updated info)
Post by: nervoustrigger on December 11, 2017, 06:56:31 PM
Paul, those two 35yd groups show a peculiar bias of horizontal stringing.  Since there was no wind to speak of, maybe put some attention on the barrel band.  I don't know if the Urban's band is designed to be tight fitting or just a guard, so to speak, but I think those groups are trying to tell us something.
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 11, 2017, 07:03:21 PM
Paul, those two 35yd groups show a peculiar bias of horizontal stringing.  Since there was no wind to speak of, maybe put some attention on the barrel band.  I don't know if the Urban's band is designed to be tight fitting or just a guard, so to speak, but I think those groups are trying to tell us something.

Thanks Jason.  It does have a screw that can be tightened, I'll have to check to see if it's loose.  I have a replacement coming from Walmart, it should be here Friday, so I'll see if it's any better than the one I have.
Title: Re: Gamo Urban Groups (updated info)
Post by: nervoustrigger on December 11, 2017, 07:13:05 PM
No problem.  FYI, probably half of the barrel bands I encounter will not snug up when the screw is tightened.  Whether or not that is by design is unknown but it's a good idea to try it both ways when dealing with a persnickety rifle.  That is, try some groups with the barrel band removed.  And then again with the barrel band nice and snug.  To accomplish that, wrap clear tape around the air tube and/or barrel until the barrel band is a slip fit to both of them.  Then when you tighten the screw, it will snug up nicely.  The benefits are well worth the effort.
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 11, 2017, 08:21:07 PM
What are you guys getting for velocities?

I'm low and slow in the 660 range. If it is calm or steady winds, no problem, but if they gust or swirl it is a completely different ball game. Once the spring winds get here I may crank it back up but I also keep reminding myself there are a lot of folks in the EU that get very good results with 12fpe. The longer barrels on most of their rifles may be the largest difference.

I shot a bit today with winds steady at 15 gusting to 22. They are mainly a headwind that caused about an inch of drop at 50. When the gusts hit they would swirl and push up to 2 1/2 inches either way. Managed decent groups once I got used to the wind, nothing to brag about but it was relaxing just to look thru the scope after a long day of work.
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 11, 2017, 08:41:42 PM
No problem.  FYI, probably half of the barrel bands I encounter will not snug up when the screw is tightened.  Whether or not that is by design is unknown but it's a good idea to try it both ways when dealing with a persnickety rifle.  That is, try some groups with the barrel band removed.  And then again with the barrel band nice and snug.  To accomplish that, wrap clear tape around the air tube and/or barrel until the barrel band is a slip fit to both of them.  Then when you tighten the screw, it will snug up nicely.  The benefits are well worth the effort.

I checked the barrel band, it seemed snug, but I tightened is as far as i felt comfortable. It's plastic so I didn't want to strip the threads.  There is a rubber o ring under the band that surrounds the barrel, so I'm guessing it should be snug.   I guess i'll see tomorrow when I shoot it again.

I've discovered that it's loosing air now also.  Might be from when i removed the gauge because it wasn't working at all.  Now it seems to register to 2000 psi, but doesn't move beyond that point , even when the gauge on my pump shows 2900 psi.
Title: Re: Gamo Urban Groups (updated info)
Post by: avator on December 11, 2017, 08:51:42 PM
Glad you got a replacement coming. Would like to see everyone as happy with this gun as I am.
Title: Re: Gamo Urban Groups (updated info)
Post by: kzz1kaw on December 11, 2017, 08:51:51 PM
I’m regulated shooting low 800’s
What was it shooting before you regulated it?
Depending on pellet weight 840’s to 880’s
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 11, 2017, 09:16:50 PM
Glad you got a replacement coming. Would like to see everyone as happy with this gun as I am.
I second that!
Title: Re: Gamo Urban Groups (updated info)
Post by: Horatio on December 11, 2017, 10:44:52 PM
No problem.  FYI, probably half of the barrel bands I encounter will not snug up when the screw is tightened.  Whether or not that is by design is unknown but it's a good idea to try it both ways when dealing with a persnickety rifle.  That is, try some groups with the barrel band removed.  And then again with the barrel band nice and snug.  To accomplish that, wrap clear tape around the air tube and/or barrel until the barrel band is a slip fit to both of them.  Then when you tighten the screw, it will snug up nicely.  The benefits are well worth the effort.

I checked the barrel band, it seemed snug, but I tightened is as far as i felt comfortable. It's plastic so I didn't want to strip the threads.  There is a rubber o ring under the band that surrounds the barrel, so I'm guessing it should be snug.   I guess i'll see tomorrow when I shoot it again.

I've discovered that it's loosing air now also.  Might be from when i removed the gauge because it wasn't working at all.  Now it seems to register to 2000 psi, but doesn't move beyond that point , even when the gauge on my pump shows 2900 psi.

I don’t know if losing air is the culprit. If you leave it coupled, does your hand pump drop to 2,000?
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 11, 2017, 11:21:10 PM
I say it’s losing air because when I finished shooting yesterday, I aired it up to 2900 psi according to the gauge on my pump.  The gauge on the Urban said 2000 psi.  This evening, the gauge on the Urban read 1000 psi.  Hopefully, I’ll get a chance to mess with it tomorrow evening and will see what the pump gauge reads.
Title: Re: Gamo Urban Groups (updated info)
Post by: Johnsairmadness on December 11, 2017, 11:31:33 PM
I recieved mine from Walmart this past Friday. Scoped it and ran it on the chrony- have it set @ 860fps JSB 15.9gr. For 25 shots with a 32fps spread. It's very accurate. Performed the 2nd stage trigger mod which is a must. Great rifle for the $$. It's quiet to. I'm thinking about buying another one. Lol.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 12, 2017, 12:21:28 AM
I recieved mine from Walmart this past Friday. Scoped it and ran it on the chrony- have it set @ 860fps JSB 15.9gr. For 25 shots with a 32fps spread. It's very accurate. Performed the 2nd stage trigger mod which is a must. Great rifle for the $$. It's quiet to. I'm thinking about buying another one. Lol.
Can't ever have enough of a good thing!
Title: Re: Gamo Urban Groups (updated info)
Post by: . on December 12, 2017, 08:53:18 AM
I haven't done any groups with either of my Urban's since last summer, but I did see a few 3/8" groups at 50 yards with the first one I bought. Good to see that y'all are getting yours wrung out and discovering the 'best' pellets. I haven't tried a whole lot of super-heavy pellets, but the 18 gr JSBs were awesome outta mine, too..

:-) chickie
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 12, 2017, 10:16:48 AM
I haven't done any groups with either of my Urban's since last summer, but I did see a few 3/8" groups at 50 yards with the first one I bought. Good to see that y'all are getting yours wrung out and discovering the 'best' pellets. I haven't tried a whole lot of super-heavy pellets, but the 18 gr JSBs were awesome outta mine, too..

:-) chickie

Guess everyone had luck with those but me haha -ken
Title: Re: Gamo Urban Groups (updated info)
Post by: . on December 12, 2017, 02:50:52 PM
Air guns can be funny like that, Ken, lol...

I once had an R7 that hated JSBs of any weight. Shot RWS Super Hollow Points like a laser, though.

Yeah, air guns sometimes be weird like that, ha ha!
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 12, 2017, 04:18:25 PM
Air guns can be funny like that, Ken, lol...

I once had an R7 that hated JSBs of any weight. Shot RWS Super Hollow Points like a laser, though.

Yeah, air guns sometimes be weird like that, ha ha!

That's part of the fun!
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 12, 2017, 05:53:29 PM
This afternoon, the gauge still said 1000 psi, so I shot it down to empty, removed the gauge and wrapped the treads with some teflon tape and reinstalled it.  I then pumped it up till the hand pump gauge read 2900 psi.  The gauge on the Urban still read 1000 psi...

I went out, put up a fresh target to see if snugging the barrel band had helped with the side to side spread.  NOT!  So, it's now wrapped back in it's plastic bag and packaged up in it's original box waiting for it's trip back to Walmart. 

The replacement is scheduled to arrive on Friday.  If it's no better, my Urban days are over!  Life's too short to mess with bad airguns!
Title: Re: Gamo Urban Groups (updated info)
Post by: triggertreat on December 12, 2017, 06:06:31 PM
Good for you Paul.  I would've wrapped it up back when you ran those 35 yard groups.  Hopefully your next one will be stellar like some of the others.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on December 12, 2017, 07:46:53 PM
This afternoon, the gauge still said 1000 psi, so I shot it down to empty, removed the gauge and wrapped the treads with some teflon tape and reinstalled it.  I then pumped it up till the hand pump gauge read 2900 psi.  The gauge on the Urban still read 1000 psi...

I went out, put up a fresh target to see if snugging the barrel band had helped with the side to side spread.  NOT!  So, it's now wrapped back in it's plastic bag and packaged up in it's original box waiting for it's trip back to Walmart. 

The replacement is scheduled to arrive on Friday.  If it's no better, my Urban days are over!  Life's too short to mess with bad airguns!
Best of luck!!
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 12, 2017, 09:05:26 PM
  So, it's now wrapped back in it's plastic bag and packaged up in it's original box waiting for it's trip back to Walmart. 

The replacement is scheduled to arrive on Friday.  If it's no better, my Urban days are over!  Life's too short to mess with bad airguns!

Really hoping your replacement works out for you, you've had much more patience than I would have had.
Title: Re: Gamo Urban Groups (updated info)
Post by: Edtampa on December 13, 2017, 06:56:10 PM
I recieved mine from Walmart this past Friday. Scoped it and ran it on the chrony- have it set @ 860fps JSB 15.9gr. For 25 shots with a 32fps spread. It's very accurate. Performed the 2nd stage trigger mod which is a must. Great rifle for the $$. It's quiet to. I'm thinking about buying another one. Lol.
What is the 2nd stage mod you mention?

My results,
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 13, 2017, 09:18:05 PM
Replace the rear adjustment screw right behind the trigger with a 2 or 2.5mm x 8 (or 10, just don't go too far, it can bump-fire) screw. It needs to be a bit longer than the factory screw, this will give you a clean break on the 2nd stage. The trigger doesn't bother everyone but I couldn't get comfortable with the creep. To me, it went from a "mehh, its a trigger" to "wow! what a trigger!"
Title: Re: Gamo Urban Groups (updated info)
Post by: huklbery on December 13, 2017, 09:47:24 PM
Replace the rear adjustment screw right behind the trigger with a 2 or 2.5mm x 8 (or 10, just don't go too far, it can bump-fire) screw. It needs to be a bit longer than the factory screw, this will give you a clean break on the 2nd stage. The trigger doesn't bother everyone but I couldn't get comfortable with the creep. To me, it went from a "mehh, its a trigger" to "wow! what a trigger!"

All three I have had have adjusted differently but simply.  First one, long classic creep on second stage, changed to a 8mm from stock 6mm adjusted too a simple short engagement.  Second one, very little creep adjusted the stock 6mm just a smidgen tighter nice release.  Third one, changed the stock 6mm to an 8mm length... still not enough...  changed to a 10mm long had a bit excess but it again adjusted to a short release.   

All easy to adjust externally, just all a bit different from each other.   
Title: Re: Gamo Urban Groups (updated info)
Post by: Rat Sniper (AKA: PaulT58) on December 13, 2017, 09:54:05 PM
Replace the rear adjustment screw right behind the trigger with a 2 or 2.5mm x 8 (or 10, just don't go too far, it can bump-fire) screw. It needs to be a bit longer than the factory screw, this will give you a clean break on the 2nd stage. The trigger doesn't bother everyone but I couldn't get comfortable with the creep. To me, it went from a "mehh, its a trigger" to "wow! what a trigger!"

All three I have had have adjusted differently but simply.  First one, long classic creep on second stage, changed to a 8mm from stock 6mm adjusted too a simple short engagement.  Second one, very little creep adjusted the stock 6mm just a smidgen tighter nice release.  Third one, changed the stock 6mm to an 8mm length... still not enough...  changed to a 10mm long had a bit excess but it again adjusted to a short release.   

All easy to adjust externally, just all a bit different from each other.   

That kind of makes me question Gamo Quality Control.  I wouldn’t have expected that much variation in triggers from the same make and model rifle.
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on December 13, 2017, 09:59:27 PM
I've only got the 1 so nothing to compare it to. I've ordered another for my son, but with Amazon out of stock no idea when that will show up. That is rather odd, especially since it appears to be the same basic trigger assembly they have in most of their rifles now. I guess they had to take the quality BSA parts and "Gamo-fy" them someway...

I can't complain too much, the Gamo Hornet is what got me into airgunning for adults a couple of years ago. It makes nice wall art now :)
Title: Re: Gamo Urban Groups (updated info)
Post by: MB on January 24, 2018, 03:02:46 PM
14.35 JSB's 35 yards Bi Pod, gun is loving these pellets, hammer spring backed all the way out and settled at 6 full rotations back in (Total around 13 )
Title: Re: Gamo Urban Groups (updated info)
Post by: toddbrat on January 24, 2018, 05:23:06 PM
Great looking groups, Mike!
Title: Re: Gamo Urban Groups (updated info)
Post by: Ken13 on January 24, 2018, 05:36:04 PM
14.35 JSB's 35 yards Bi Pod, gun is loving these pellets, hammer spring backed all the way out and settled at 6 full rotations back in (Total around 13 )
Those are great! What fps are you getting?
Title: Re: Gamo Urban Groups (updated info)
Post by: MB on January 24, 2018, 05:55:30 PM
760 - 790
Title: Re: Gamo Urban Groups (updated info)
Post by: MB on January 24, 2018, 05:57:07 PM
This is based on me using Chrono prior to this group and based on me playing with the hammer spring tension...I like where it is now, good shot counts, but will have to Chrono to give you a more accurate FPS :)
Title: Re: Gamo Urban Groups (updated info)
Post by: agorena123 on January 24, 2018, 06:45:48 PM
14.35 JSB's 35 yards Bi Pod, gun is loving these pellets, hammer spring backed all the way out and settled at 6 full rotations back in (Total around 13 )

very very nice! 
Title: Re: Gamo Urban Groups (updated info)
Post by: Dethtool74 on December 19, 2018, 10:53:23 AM
My Gamo Urban hates anything below 15-16gr and are all over the place. So far the 16.20gr H&N Hornets are the most accurate at 30 yrds with grouping around .5 in. Hornets will fit in the mag as long as you don't push them in too far the mag will still rotate without issues. I'm gonna try the Barracuda 21gr next and see how they do as well as the JSB 18.13's. Anyone know how many hammer spring turns is max power and if it will in fact come off the threads if turned too far in?
Title: Re: Gamo Urban Groups (updated info)
Post by: Toddspeed on December 19, 2018, 11:05:02 AM
It will definitely go off the threads if you go too far. I counted turns with the gun disassembled, and found that the adjuster will fall out of the threads at 21-22 turns. However, the real problem might be the spring could reach coil lock before you go 21-22 turns. If you want maximum power try backing the adjuster all the way out, counter clockwise, then go in  about 15 turns and try to cock the rifle. Then one more turn in, and cock. Continue this way until it won’t cock, then back it out 1 turn. You might find your maximum power before you reach the 21-22 turn ‘danger zone’.
Title: Re: Gamo Urban Groups (updated info)
Post by: Dethtool74 on December 19, 2018, 11:12:45 AM
Thanks for the info Toddspeed. I've got it set to 15 turns right now and have had it up to 18 but decreased the shot count dramatically.
Title: Re: Gamo Urban Groups (updated info)
Post by: Toddspeed on December 19, 2018, 11:31:23 AM
Yeah, shot count does go down a bit, gun gets a lot louder too.

The factory setting of 12-13 turns gives about 23 ftlbs of energy, but it seems most Urban owners like to turn it down to less than 10 turns, giving 15-20 ftlbs. It gives more shots, quieter shots, and in most cases is still super accurate out to 40 yards.
Title: Re: Gamo Urban Groups (updated info)
Post by: Dethtool74 on December 19, 2018, 11:57:07 AM
Cool beans. Now I know finally. I've been searching all over the net for info on ft lbs energy related to hammer spring turns. Thank you soo much. I don't have the gear to figure it out for myself so I have to rely on others statistics.
Title: Re: Gamo Urban Groups (updated info)
Post by: Toddspeed on December 19, 2018, 12:15:16 PM
I know how you feel, I just got my chrono. Before that I’ve been like you reading all I can to see what the gun can do. Do a search here on GTA for “Urban”, and you’ll find more detailed info. If I can find some of the more detailed posts I’ll copy them here for you.
Title: Re: Gamo Urban Groups (updated info)
Post by: Dethtool74 on December 19, 2018, 01:51:41 PM
Thanks man and I'll do the same.
Title: Re: Gamo Urban Groups (updated info)
Post by: Ribbonstone on December 19, 2018, 10:10:40 PM
If all you HAVE is 35 yards,and all you intend on using the rifle is 30-50 yards,shooting at longer range would be interresting...but uninportant,,,it's interreesting information,but not somthing you'd use.

 It is very unlikely to "go stupid" in the 10-15 yards past 35 yards,and very-very untilely to do WORSE at shorter distances.

 HAve had low pwered PCP's(like the 12 foot pound versions) do very very well at longer ranges (50+yards)...but that is pretty much useless information as you'd really not willingly select a 12 foot pound rifle for shooting things at 40-50 yards.

I'd not recommend a 20-25 foot pounds .22 for 50-60 yards either.

So basically....70-80 yards...bother to shoot that range iif interrested as a instructional topic.... otherwise, stay shooting in the most useful range (and if you long for long range,get a PCp that will toss really heavy/high BC pellets to  high energy).

OK...enough of the semon...lets sing.
Title: Re: Gamo Urban Groups (updated info)
Post by: Dethtool74 on December 19, 2018, 11:06:33 PM
I just ordered 2 tins of H&N Barracuda Match 21.14gr to try at longer ranges. The Hornets are very accurate at 35-40 yards but just don't have the weight to maintain momentum like a heavier pellet. Might be a little heavy for my gun but am unsure. I'll see when they get here I guess. Next will be JSB Exact 18.13's