S&W's manual says, pretty much, to stay away from all Remington ammo. I agree, it's (pretty much) junk from my perspective and I haven't had much luck with it. The manual also says that the 15-22 loves CCI ammo, and my rifle loves the stuff. I feel kind of bad for those with ejector problems... I've run I don't know how many rounds through mine and can literally count the FTFs and other issues on one hand. Also seems to like Federal (nice, cheap bulk packs) and Win hi-velocity. Have stayed away from Wolf and Tula (sp?)... heard they were absolute junk. Anyone have an opinion and/or experience with those brands?