Have put new spring from Gamo and new Gamo piston seal. New breech seals.
i am only getting about 14.3 fpe with gamo pro magnum pellets 15.43 grain. have shot about 200 pellets through it. i was hoping for about 16fpe
breech seals not leaking , (i actually took in and out several times to make sure was not getting nicked, all perfect) checked with talc powder around breech
wonder if i should keep shooting to bed in more or put couple power washers on spring
i did all the polishing and de burring etc and used moly paste 60% very very sparingly , actually burnished it into the piston and cylinder etc and made sure was non left in. basically is running dry but very slippery
not sure why is lowish on power