As far as remington ammo goes, its all I put through my .22's. May not be the cleanest, but I know it will work everytime. That, and it feeds best in my 10/22(gets it all gummy, but I've never had an ammo related problem with it after 12000+ rounds in that gun alone, all but a few hundred were remingtons). Also find that with other brands of ammo, I have to fiddle with the sites every so often, especially with the Federal plinker pack(though my dad swears by it, sucks for me when I have to bum off him). The rounds seem to vary a lot for some reason.