Gamo Urban Groups (updated info)

[Ken13]

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!

[Rat Sniper (AKA: PaulT58)]

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!

[triggertreat]

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.

[Ken13]

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!!

[toddbrat]

  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.

[Edtampa]

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,

[toddbrat]

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!"

[huklbery]

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.   

[Rat Sniper (AKA: PaulT58)]

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.

[toddbrat]

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

[MB]

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 )

[toddbrat]

Great looking groups, Mike!

[Ken13]

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?

[MB]

760 - 790

[MB]

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

[agorena123]

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! 

[Dethtool74]

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?

[Toddspeed]

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’.

[Dethtool74]

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.

[Toddspeed]

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.