The first three rounds, no problemo. Then - kaboom! Fortunately, the gun retained the slide, but the grip body was cracked, the slide distorted and the magazine was spat out the gun along with the unexpended rounds. Wasn't hurt aside from a little numbness to my hand and I had to pick a couple of pieces of brass out of my face.
The lesson here is obvious - don't ever buy gun show reloads! Never did find the guy who sold 'em, BTW. He was basically MIA from then on. I'm guessing that I wasn't the only dissatisfied customer.
I'm so anal about it I do them all on a single stage press. Call me a reactionary but I just don't trust those fancy shmancy progressive jobs.
Blew the damn mag out and locked the slide!
That is what I saw.
twice.