same PCP rifle after use different barrel... u will get different number of shots.
if with .177cal u can get 100 shots...
u will get 125 shots with .20cal barrel.
u will get 150 shots with .22cal barrel.
aournd 25% air save from .177 to .20...
What was the power output of the different barrels?
same power output...the bigger the calibre the more air efficient the rifle