This may be a silly question but here goes. I was thinking of trying a re crowning job on a gamo shadow hoping for better accuracy when as usual I starting questioning my self and then over analyzing:) I started thinking that if the "compressed chamber air" was equal to the volume of the barrel (meaning that the air pressure behind pellet should be spent, just as pellet leaves the barrel) then that would insure that the pellet was pushed all the way to the muzzle... but if I cut the barrel too short the pellet would leave the barrel before all the air had finished pushing the pellet and therefore I would lose FPS ? on the flip side if barrel is to long then friction would slow pellet down if pressure dropped of to early?
IT seems to me the spring power is the big factor hear choosing the not too strong , not to weak ...or is it simply big spring big power volume does not matter:)
Is this a valid thought to consider or just to small to matter? I know the Diana have different barrel lengths using same power plant not sure if crony would show anything different! Tony.