I just tried a bunch of ammo through the AR7: Stingers, MiniMags, Federal Game-Shok and Reminton Golden Bullets. For me, CCI Minimag works best - no jams yet. Stingers very rarely jam, and Remington 'Game Load' Golden Bullets and Blazers function well and are cheap alternatives. I have found that federal "game shok" failed to extract pretty much every time in the Henry, and were also useless in a couple of my other guns.