Most of the time the block OVER ROTATES and this causes the pellt loading problem. I have not seen one that is to small yat but there could be a first time.
A Gamo is not even close to be broken in till you have at least a thousand pellets shot. By then everything has settled down and the fps is up to almost it's max. The trigger will have smoothed out the twang is reduced, cocking gets smoother, etc.http://home.comcast.net/~peterdragin/index.html/