Make a believer out of me!

Not a dumb question but on the back or bottom of the tin there should be a white sticker with the actual mm listed. Just look for it and the numbers.

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I fired 5 shots over my chrony today with the .22 GTO Predators with my ASP20. 943 fps @ 23 ft lbs. I'll do some accuracy testing with them. Many report they are accurate in magnum springers. Being light they'd probably make a good hunting pellet out to 25 yards.

That might be a little too fast. I’ve read that they tend to do best under 860 FPS. I had a Hatsan 95 that did right at 900 with them, and you could see them corkscrewing in the scope as they flew down range. How fast does your 34 shoot them?

Makes sense to me. They shoot a little harsh in my Sig telling me they are to light. Although, if you watch the Airgun Depot video that Travis did on the .22cal Sig ASP20 he averaged close to 970 fps with the GTO. I think that test rifle was on steroids though. The Airgun Depot business is in Utah at somewhere around 4500 ft above sea level. At that elevation my gun would probably shoot the GTO somewhere in the 900 fps range. That means if I shot that test rifle at my location ( 85 ft above sea level) I'd be close to 1000 fps ! Or...26 ft lbs of energy which is way higher than the production rifles. Travis achieved very good accuracy with the GTO. Probably one of the better pellets accuracy wise. The Sig Wraith alloy pellet at 12.35 gr (they actually weight 13.3 gr on average) had the best accuracy of the pellets he tried. Tom Gaylord also got excellent accuracy with the Sig pellet.

I’d still be interested in how fast your 34 shot the GTO’s. Especially if you could chrono any regular lead pellets along with them for comparison.
 
I fired 5 shots over my chrony today with the .22 GTO Predators with my ASP20. 943 fps @ 23 ft lbs. I'll do some accuracy testing with them. Many report they are accurate in magnum springers. Being light they'd probably make a good hunting pellet out to 25 yards.

That might be a little too fast. I’ve read that they tend to do best under 860 FPS. I had a Hatsan 95 that did right at 900 with them, and you could see them corkscrewing in the scope as they flew down range. How fast does your 34 shoot them?

Makes sense to me. They shoot a little harsh in my Sig telling me they are to light. Although, if you watch the Airgun Depot video that Travis did on the .22cal Sig ASP20 he averaged close to 970 fps with the GTO. I think that test rifle was on steroids though. The Airgun Depot business is in Utah at somewhere around 4500 ft above sea level. At that elevation my gun would probably shoot the GTO somewhere in the 900 fps range. That means if I shot that test rifle at my location ( 85 ft above sea level) I'd be close to 1000 fps ! Or...26 ft lbs of energy which is way higher than the production rifles. Travis achieved very good accuracy with the GTO. Probably one of the better pellets accuracy wise. The Sig Wraith alloy pellet at 12.35 gr (they actually weight 13.3 gr on average) had the best accuracy of the pellets he tried. Tom Gaylord also got excellent accuracy with the Sig pellet.

I’d still be interested in how fast your 34 shot the GTO’s. Especially if you could chrono any regular lead pellets along with them for comparison.

I'll try some in my M34. I know they'll do a easy 800 fps. Probably in the 800 to 820 range. 
 
I fired 5 shots over my chrony today with the .22 GTO Predators with my ASP20. 943 fps @ 23 ft lbs. I'll do some accuracy testing with them. Many report they are accurate in magnum springers. Being light they'd probably make a good hunting pellet out to 25 yards.

I'm thinking about an ASP20. Is there a reason for choosing the .22 over thte .177?
 
I fired 5 shots over my chrony today with the .22 GTO Predators with my ASP20. 943 fps @ 23 ft lbs. I'll do some accuracy testing with them. Many report they are accurate in magnum springers. Being light they'd probably make a good hunting pellet out to 25 yards.

I'm thinking about an ASP20. Is there a reason for choosing the .22 over thte .177?

The .22 has more FPE. I have the asp20 chambered in .177 and can say that at 20 fpe, combined with its accuracy, make this gun a small game's nightmare. I keep wondering if I should have gotten the .22...
 
I fired 5 shots over my chrony today with the .22 GTO Predators with my ASP20. 943 fps @ 23 ft lbs. I'll do some accuracy testing with them. Many report they are accurate in magnum springers. Being light they'd probably make a good hunting pellet out to 25 yards.

I'm thinking about an ASP20. Is there a reason for choosing the .22 over thte .177?

I'd say it's your choice. The Sigs power plant does produce more energy with equal weight pellets. Example, my .22 cal will shoot 943 fps with a pellet weight of 11.7 gr. The .177 cal Sig with a similar weight pellet will probably be in the 875-885 fps range. The .177 cal Sig shoots best with pellets in the 10 gr range. I think those shoot in the 910-930 fps range. Bottom line is choose the caliber you like.