Well, I usually don't reload 9mm ammo. I have before in the past. As long as its 5 dollars/box, I doubt I will. Usually stock up on UMC ammo. Well yesterday, I went to the pistol range, and had a peirced primer. Which might have meant overpressure. I have shot probably 5000 rounds of UMC 9mm in my life, and this is a first. It started off as a stovepipe in my berretta. That is kinda odd as this gun has never jammed, and then I noticed the primer.

I always saw that UMC's were loaded down. Usually a very fast powder (probably cause they are cheap).

Could have been a bad scene.