What rifle are testing for? I've been tearing my hair out rebuilding a Diana 52 in 22, and pellet testing. FAP's are a problem as they are too light and sail over limit whilst providing little accuracy. The rifle is stripped down while I am thinking... (and the action is away locally for reblacking) Yet JSB Jumbo work really well as do Crosman premier.

Concurrently I've rebuilt a 48 (now a 52 after a stock change) in 177. Had lots of problems with that but now got it cracked- at last!

All good fun as long as you don't weaken! I could strip a 48 or 52 with my eyes closed in a dark room now