Jeff claimed: I used 1000 rounds of this in my mp5 and only had two failures. One was a failure to eject, the other was a failure to detonate.Lewis C. stated: I have run 1000s of rounds, thru a variety of 9mm hand guns. Most recently a Glock 43. I haven't had a misfire, jam or any other kind of problems working with this ammo.Whiskey Bravo stated: