I have 4 of the 5 mentioned, and all have fired very well out of 5 different PCP rifles. The only 1 that I don't have is the Predator Polymag - They're cool, but just too light. Hmm.. Maybe I'll have to grab a tin and try them in my pistol..
I was thinking that too - the Polymags seem light for a .22 hunting pellet. Then again, a 9-10 grain pellet from my .177 will be fine for a rabbit or squirrel, at fairly close range, so I guess it would work fine.