Having used Blazer Br and Al, Federal, WWB, Magtech, S&B, Remington and Wolf by the thousands or tens of thousands I've never had an ammo problem. As luck would have it I have not even had a misfire. The amount of "bad" ammo made by modern factories is such a low low% that even with me firing over 15K/rds of 9mm last year I didn't have a single ammo problem. I would need a huge data base before I would expect to find any real difference between major manufactures.