Thanks BBF,

I'll clean the hammer rail and report back,
oh if anybody has seen a decent strip down video please share, thanks

I have a second hand HFT500 owned almost a year, which does not leak, normally very accurate but last few days a few erratic groups makes me think a service is overdue. (I do clean the barrel regularly and feed it good ammo. I have taken apart and tuned a lot of springers but never a PCP. Are there ...