I started mine out with Winchester Super Speed HP and had a few failures to feed where the round was bent about 20°. Switched to CCI Tactical and had zero problems. Since then I have run Blazer Bulk, CCI Standard Velocity, American Eagle, and CCI Mini-Mags, with absolutely zero malfunctions after more than 1,200 rounds. I routinely run a snake through it after every 150, or so, rounds.