No injuries. It was a sub, so just a squib in the throat.
The real bitch of it was he didn't tell me.
A couple weeks later, I was going to shoot that rifle and couldn't chamber a round. Then I checked the mag, found a mix of 223 and 300blk.
I found a squib in my MPX, too.
It was his bachelor party weekend, and I left several toys out for them but wasn't here. He was 22 at the time, and had been shooting since he was 6. Even if his buddies didn't, he should have known WTF he was doing.
ETA: The assholes didn't clean out my smoker, either!! It was a couple months before I used it after that weekend, and found the water bowl full of mold!!