I have shot a couple of thousand rounds of this without any problems and think it is pretty good stuff. a while back I started have a lot of misfires and really weak sounds with it. it wouldn't even cycle the bolt on my Ruger 22 auto pistols and I wouldn't think of even firing them in any 22 rifle. I sent an e-mail to Federal with the lot # 1BW425. their reply was how boxes of this lot # did I have. I told them I had 2 1/2 boxes of that lot #. Federal sent me 5 boxes of replacement ammo. I think that is pretty good. I just have to get rid of the other 2 boxes of ammo. the way the weather is right now it will probably be the middle of July before I can get into the range.