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Hi all, I was hoping I could get some advice, I put an 8mm wildcat/maveric hammer in my panthera .25 hunter compact and it opens the valve fine giving me about 860 fps on the altaros 49.5s. Same thing with my Dynamic 700mm .25, but now, my Dynamic .357 the valve does not seem to open how I...

Hi There, I was hoping someone would be able to help me out. I am trying to reduce unnecessary spending and testing time and would like to get a rough idea of what velocities I could expect given a change in projectile weight only. No other changes. Say I reach 1000fps with 26grains .25cal...

Hi There, I am experiencing an odd issue with the GK1, or at least I think it is odd, not sure maybe its working as intended. First thing I noticed after the pistol arrived was the tank was filled, this was odd as the other airguns I own were shipped empty. The second thing I noticed was the...