Glock bulge or worse.

No, that is a 9mm round fired in a .40 S&W, or .45 ACP chamber!!

What does the headstamp say it is??

Yes, the shooter should have noticed that.
Before he loaded the magazine with the wrong ammo!!

rc

it happened to me one time, several years ago when a shooting buddy had a bucket with several hundred 40sw rounds that he wanted to burn, we were jamming mags and drinking coffee and i never noticed the 9mm round that i picked up. . . .i was being careless. i went to shoot the course of fire and "bang bang bang pop" and i didn't eject. curious i opened the slide and there was a 9mm case that fit the 40sw chamber. it did not split but it was ballooned. it was scary, we emptied all mags by hand and reloaded, verifying our rounds with much more care.

So a .40 fired in a .45 then.

I have seen that happen to a buddy of mine. Funny thing is, we never did figure out where the .40 came from. He wasn't shooting a .40, I wasn't shooting .40 and none of the other people on the same table as us were using .40's......weird

Yep, 40 fired in a 45.

Whatever model 45 it was must have an awesome extractor to have held the case against the breech face with enough tension to ignite the primer.

Ah the rare rebated rim of the 40-45, I have seen 9mm fired from 40's too and they didn't blow out the case.

Even came across a 264 win mag case that had the neck blown into flutes (must have been fired from a 300 weatherby or win mag.)

Here's a beauty found in my brass bin.. Bad brass that had been reloaded?

That's definitely more than fatigue. That's in-correct usage and the shooter was lucky not to have been injured (if they weren't).

Glock bulge is simply a "slight" bulge at the bottom, close to the rim.
Post #12 http://www.thehighroad.org/showthread.php?t=755661&highlight=glock+bulge

ilustrates a SEVERE glock bulge that I would consider a thow away case.
Most Glock bulges areonly 15% of that and certainly reloadable. I have a gen2
G22 and a gen3 G29 that I have no issues getting at least 5 or 6 (maybe 8)
reloads out of if I'm not pushing it, and having no signs of failure or fatigue.
YMMV. The photo in post#12 above is shot!!!!

Here's a beauty found in my brass bin.. Bad brass that had been reloaded

Click to expand...

That pink colored case tends to be steel from what I've found scrounging brass.

Pink brass is from zinc leaching out of the brass. Looks like it sat on the ground too long.

You can see the pits from the corrosion all over the case. Also note that the primer backed out. The case eruption caused that, just like too lght of a load.

A testament to the engineered safety of firearms. The firearm contained it and sent said wrong bullet on it's merry way down the pipe without injuring anyone.

No bets on proper ejection, but clearly sealed the chamber, kinda, on ignition.