GTA
Airguns by Make and Model => Gamo Airguns => Topic started by: H95Kidd on January 29, 2024, 08:31:43 PM
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Shot a few targets today with my Pro, using 15.89 JSB and 14.66 gr Vortex pellets. These two groups are about as good as I could manage. Sandbag front rest and just the shoulder in the rear. The thing would shoot three or four in one hole, then a flier or two would spoil the groups. This theme just basically kept repeating. Pretty sure it was ME causing the fliers and not the Pro. Overall, pretty happy with how she shoots though... For those considering getting one of these--This thing will give you a work out just cocking it. I removed the front sight blade and made a plastic filler block for the dovetail. Made it easier on my hand to grasp the moderator and cock the buggar!
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I shot mine at 30yds today and was at about an inch group w/ Norma 15.9g & Norma Heavy 17.6g. Im not too concerned about accuracy at this point, as I only have 460 shots thru it and its cold here, 30*
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Shot a few targets today with my Pro, using 15.89 JSB and 14.66 gr Vortex pellets. These two groups are about as good as I could manage. Sandbag front rest and just the shoulder in the rear. The thing would shoot three or four in one hole, then a flier or two would spoil the groups. This theme just basically kept repeating. Pretty sure it was ME causing the fliers and not the Pro. Overall, pretty happy with how she shoots though... For those considering getting one of these--This thing will give you a work out just cocking it. I removed the front sight blade and made a plastic filler block for the dovetail. Made it easier on my hand to grasp the moderator and cock the buggar!
I shot mine at 30yds today and was at about an inch group w/ Norma 15.9g & Norma Heavy 17.6g. Im not too concerned about accuracy at this point, as I only have 460 shots thru it and its cold here, 30*
Hi Joe and Frank.
Good shooting with your New Gamo Magnums.
One inch at 30 yards is about what I got with the .22 cal. Gamo Magnum GR that I bought two months ago.
So far, most of my shooting has only been done with Crosman 14.3 gr. Hollow Points.
I had my rifle out hunting recently and harvested 2 nice grays shooting Gamo 15.4 gr. Redfire Hunting pellets.
No POI shift with the Redfires so I did not have to adjust the scope.
It's been cold here in Minnesota too, Frank , but much warmer weather has arrived today.
Best Wishes - Tom
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It was mid 30*'s again today and I got another 100 pellets thru the gun. Shot count is now 560. I told myself that im not going to judge its accuracy until I see 1000 pellets thru it, so Ive been shooting the cheap pellets that I have alot of. So for now, its mostly Norma 15.9g and Crosman CPHP 14.3g, ans some 17g Norma heavy pellets.
Well today this happened. I decided to see what the trigger pull was, and try a longer trigger screw. Stock screw turned all the way in was 4.5lbs, with the longer screw, 1.5lbs. This alone has made a huge improvement in accuracy! Remember, I not even trying for accuracy yet, and just paying attention on the way the groups tightened up. Down to about .75" to 1" at 30 yards. I have a cheap 4-12 scope on a Chinese recoil mount. I was shooting off a front bag today and for laughs, I took a whack at a 6" target 45yards out, and this happened- 3 in a row!
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Hi Frank.
Nice 45 yard shot group.
Best Wishes - Tom
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(https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=212625.0;attach=450089)
^ Excelent !
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I had a silent cat and it was good out to 25 yards. After that it opened up a lot.
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It was mid 30*'s again today and I got another 100 pellets thru the gun. Shot count is now 560. I told myself that im not going to judge its accuracy until I see 1000 pellets thru it, so Ive been shooting the cheap pellets that I have alot of. So for now, its mostly Norma 15.9g and Crosman CPHP 14.3g, ans some 17g Norma heavy pellets.
Well today this happened. I decided to see what the trigger pull was, and try a longer trigger screw. Stock screw turned all the way in was 4.5lbs, with the longer screw, 1.5lbs. This alone has made a huge improvement in accuracy! Remember, I not even trying for accuracy yet, and just paying attention on the way the groups tightened up. Down to about .75" to 1" at 30 yards. I have a cheap 4-12 scope on a Chinese recoil mount. I was shooting off a front bag today and for laughs, I took a whack at a 6" target 45yards out, and this happened- 3 in a row!
HPP-- That is great shooting at 45 yds! The targets I posted from my Extreme Pro were shot at 50FT, and I though THEY were pretty good! Clearly, I have some work to do... Re the trigger screw, did you use the one sold by Airgun Detectives, or find/make your own as I did? You indicated going from a 4.5 lb pull down to 1.5 lb just by use of the replacement screw. WOW! That is a huge improvement on that CAT trigger. I have not actually measured mine, but it IS definitely better. I wonder, though, how does one KNOW when adjusting that screw--exactly when "enough is enough"?? What "technique" if any, did you employ here? I was looking for an improvement on my 2nd trigger pull as well, and I know there is "more there" by adjusting it further. But I wanted to be SURE to leave sufficient piston engagement with that trigger, so that any improvement would not cause any undue wear or more importantly, compromise safety. Mine is better for sure, but again, how does one know where to stop with this adjustment? These triggers are WAY different than those found in powder-burners, as the PB triggers are not "holding back" the tremendous force of an air rifle's main spring or gas ram. Interested in your thoughts on this. Anyone else feel free to chime in as well.
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H95Kidd; I have a large assortment of nuts/bolts/washers/screws at work, so I was able to find a longer 12mm screw.
I have a trigger gauge and used it to adjust like this... I put the longer screw all the way in and backed it out until the trigger weight came up to 1.5lbs. With the screw all in, the gun would not latch when cocked. I backed it out 1/2 turn until it would latch, then out some more until I was satisfied. I banged on the stock to test if it would accidentally fire.
This longer screw is not the best way to lighten the trigger, as it decreases sear engagement, but it does the job. I bought a Charlie Tuna trigger, but Im not going to install it until I have 1000 shots thru the gun, in case I have any warranty issues. Its easy enough to put the stock screw back in if I have to send the gun back. When I go ahead and install the CDT trigger, Im probably going to de-bur and polish the parts. The Gamo gunsmith will see the work and likely void my warranty. I work on my own guns anyway, and I want to find a source to buy a replacement gas ram & piston seal just in case.
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H95Kidd; I have a large assortment of nuts/bolts/washers/screws at work, so I was able to find a longer 12mm screw.
I have a trigger gauge and used it to adjust like this... I put the longer screw all the way in and backed it out until the trigger weight came up to 1.5lbs. With the screw all in, the gun would not latch when cocked. I backed it out 1/2 turn until it would latch, then out some more until I was satisfied. I banged on the stock to test if it would accidentally fire.
This longer screw is not the best way to lighten the trigger, as it decreases sear engagement, but it does the job. I bought a Charlie Tuna trigger, but Im not going to install it until I have 1000 shots thru the gun, in case I have any warranty issues. Its easy enough to put the stock screw back in if I have to send the gun back. When I go ahead and install the CDT trigger, Im probably going to de-bur and polish the parts. The Gamo gunsmith will see the work and likely void my warranty. I work on my own guns anyway, and I want to find a source to buy a replacement gas ram & piston seal just in case.
Frank-- Thanks for that info on your trigger adjust process. Makes sense. I don't think I went quite as far as you when I did mine, as I can still feel a bit of "creep" in the trigger before the shot breaks. On mine, I used an allen head machine screw a bit longer than the factory screw, and used some thin washers under the head of the screw to "fine tune" my adjustment. I wanted the screw to be "bottomed out" at my final setting instead of loctite-ing it in there. Initially tried two washers (they are like .020" thickness individually), and the trigger was WAY improved over stock. I then decided to try the trigger adjusted with NO washers under the screw, in effect shortening the new screw by about .040", and man, that trigger was SO sweet set there--- it still cocked just fine, and broke like a Rekord, but I was a little concerned about perhaps too little sear engagement. So I decided to not be so greedy, and split the difference, and placed just one .020" washer in there under the screwhead. At that setting I decided to be happy/call it good. It's still a tremendous improvement over the stock trigger pull. My feeling is that due to the small amount of trigger "creep" I can still feel pulling through the 2nd stage, along with doing multiple "bump" tests with the rifle cocked, that the trigger is safe. However, if I ever DO decide to sell the rifle, I will re-install the factory screw in that trigger.
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I did some 30yd, 7-shot pellet testing today. It was 43* and the Gamo now has 723 pellets down the barrel. Im using a cheap scope on a Amazon recoil mount. I shot 11 different pellets. No scope adjustments either. At 30yards, I get no drop in poi with 13g to 21g pellets. The 11.9g RWS Hobby were all over (too light). This .22 just keeps getting better as the shot count goes up.I will check the fps when I hit 1000 shots. I took a few shots at a 45yd target, even left the scope set at 30yds & still nailed it every time. Its quickly becoming my favorite airgun. Im happy I didnt listen to the Gamo-haters.
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Main reason I hate Gamo, is their best guns never get deep sale discounts ;)
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H95Kidd; I have a large assortment of nuts/bolts/washers/screws at work, so I was able to find a longer 12mm screw.
I have a trigger gauge and used it to adjust like this... I put the longer screw all the way in and backed it out until the trigger weight came up to 1.5lbs. With the screw all in, the gun would not latch when cocked. I backed it out 1/2 turn until it would latch, then out some more until I was satisfied. I banged on the stock to test if it would accidentally fire.
This longer screw is not the best way to lighten the trigger, as it decreases sear engagement, but it does the job. I bought a Charlie Tuna trigger, but Im not going to install it until I have 1000 shots thru the gun, in case I have any warranty issues. Its easy enough to put the stock screw back in if I have to send the gun back. When I go ahead and install the CDT trigger, Im probably going to de-bur and polish the parts. The Gamo gunsmith will see the work and likely void my warranty. I work on my own guns anyway, and I want to find a source to buy a replacement gas ram & piston seal just in case.
Hey Frank, be sure to update us on the CDT trigger when you get to installing it. Inquiring minds will want to know if the CDT trigger is really worth the trouble over the "longer 2nd stage screw" band-aid "fix" to that CAT trigger. You have got to be getting close to that 1000 pellet count you mentioned through your Pro. I'm no where near that number YET. I've been fooling around too much shooting my new Diana Airbug .22 cal, that thing is addictive and such a bargain as well. Don't know how Diana can market such a deal as the AirBug for approx $140. Well, perhaps the Chinese manufacturing may enter into it a bit on that price--But I digress... Back to the Gamo--- Anyway, I'll get back to shooting the Gamo Pro again soon, when my AirBug addiction begins to wane a bit ;D.
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Sad thing is most gamo parts come from australia , you may find a seal if you can match it bit the big seals for the magnums you have to order, you can get a magnum spring and clip it as needed or order a gas ram, i just changed my old extreme out to a ram its easier to cock and is a hammer i shared the chrony results with Tom i must have shot it 50 times before it quit deiseling was shooting well over a 1000 fps with a 18g, finally settled down to 890s with 15 g. . they have a huge tophat and the guide was made into the rear cap on mine , Its still no daisey to cock but not near like the spring and a solid thump, before with the spring and that half a pound top hat it would almost jump out of your hand. David
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Rocker1, What size ram/seal did you fit into your older Extreme? The latest Extreme takes a 33mm ram and I cant find one anywhere.
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https://www.customairseals.com/product/gamo-33mm-piston-seal/