My 9mm Shield is not a Performance Center model, but it has run flawlessly since the day I bought it. I've tried aftermarket magazines, and they all seem to work. I've yet to find ammo it won't feed, from the cheap Tula stuff, all the way up to a variety of premium defense loads. I'm somewhat surprised to hear these reports. I have been thinking about getting one in .40. I hope to do this in time for roaming the woods this fall.
