I was shooting my M&P15-22 two weekends ago using Federal American Eagle ammo. I had about 5 FTEs per 25 round mag. That was too many and so I got the Volquartsen extractor. I also bent the ejector closer to the bolt. This past weekend I went and shot 100 more rounds through it. Not a single issue. I am sold on this extractor! Now bending the ejector might have helped just as much, but the extractor sure didn't hurt. Definitely worth the $12 or whatever I paid for it.