Hello. Is your pr900 a .177 or .22? And does anyone know if transfer port size varies for the two? I know 177s let out more air per shot to give the speed needed for similar power despite lighter pellets (hence lower shot count in 177s usually).
I've just bought a 177 and I like it. Only used it for couple o of hours, but seems to give 4 full magazines (36 shots) with very little variation in speed, and no aim point changes at medium ranges, from ~190 - 150 bar fill (according to on gun manometer).
My only complaint is that it's spitting most pellets out at between 9.5 - 10.5 ftlbs (