Hi, I use JSB exact heavy, in my opinion it is good pellets for my little loly, my experience is not so big, but I think I will use only this type of pellets. For Gamo Hunter 440 I use H&N Baracuda Match 10.65 Grains, Round Nose. It is also good pellets, but I never used it for loly, may be I should try to do it, Who knows may be will be same result? During next vacation I will try to use it, and after test, I will report.