I have problems with my FX500. Not what happens but I have a difference of 40 m \ s in 65 shots ... The gun is new shot about 500 shots should have stabilized the regulator or have to shoot over another 500 shots?220 bar up to 150 bar is only 65 shots more or less the shots range from 920 fps with the slowest shot below 800 fps. It is too inconsistent to be working well ...