I had a bad couple of boxes of Winchester - probably 1 in 20 rounds wouldn't fire the first time. Probably just the ammo though. Got a few thousand rounds through my SR9 and it eats everything I feed it with no problem - AE, remington, wolf, whatever is in stock at the time. The SR9 is a super reliable, easy to service and fun platform. Sad that it doesn't get as much play as glocks, M&Ps and others.