Jeff mentioned: I used 1000 rounds of the in my mp5 and only had two failures. One was a failure to eject, another was a failure to detonate.Lewis C. stated: I've operate 1000s of rounds, thru a variety of 9mm hand guns. Most just lately a Glock 43. I haven't had a misfire, jam or every other sort of troubles making use of this ammo.LARRY claimed: