All companies will put out a bad run of brass every now and then, they will get an employee that does not care, comes to work hung over, or smokes a joint on break.
I've had bad lots of all brands of brass with the exception of lapua, so don't hate all of PMC brass.
There are two types of PMC brass. One is headstamped ELD and the other is stamped PMC. The stuff that is headstamped PMC is made in Korea and is as tough as Lapua brass in 243, 22/250, 270, and 257 Weatherby that I have had. If you have some 243 brass that is headstamped PMC, you are a lucky man indeed.