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AR15.COM
12/31/2007 1:25:02 PM EDT
Yesterday I was at the range on a date.  () I was shooting my Glock 17 and had an odd sounding shot. I cleared it and field stripped it, nothing apparently wrong with it that I could see.

Reassembled it, function checked it, looked down, saw a black piece of brass on the table.  No deformation, still hot.  I'm assuming it was the brass from that shot.  Just burned black over about half of it.  WTF?
12/31/2007 1:41:36 PM EDT
[#1]
Was it steel-cased ammo?  Sounds like the case didn't fire form to the chamber.  This will happen with unusually hard cases, steel cases, etc.  I've had it happen with .22 sometimes (shitty remington thunderbolts).  Lots of foreign ammo has plated steel cases, and this will happen.
12/31/2007 1:45:08 PM EDT
[#2]
Squib load that shot the bullet out but didn't have enough force to seal the side of the case against the chamber wall causing blowby. Thats the black you see.

Shoot Wolf in an AR and you can see where the sidewalls of the steel cases tend to be discolored more then brass one's would with carbon.
12/31/2007 1:46:41 PM EDT
[#3]

Quoted:
Was it steel-cased ammo?  Sounds like the case didn't fire form to the chamber.  This will happen with unusually hard cases, steel cases, etc.  I've had it happen with .22 sometimes (shitty remington thunderbolts).  Lots of foreign ammo has plated steel cases, and this will happen.
Brass cased.
12/31/2007 2:25:25 PM EDT
[#4]
Fired out-of-battery?
12/31/2007 2:35:43 PM EDT
[#5]

Quoted:
Fired out-of-battery?
It's a slow fire only range.  I think I'da caught it.  Could be though.
12/31/2007 2:59:07 PM EDT
[#6]

Quoted:
Squib load that shot the bullet out but didn't have enough force to seal the side of the case against the chamber wall causing blowby. Thats the black you see.

Shoot Wolf in an AR and you can see where the sidewalls of the steel cases tend to be discolored more then brass one's would with carbon.


I'd put my money on this.
1/1/2008 11:12:34 AM EDT
[#7]

Quoted:

Quoted:
Squib load that shot the bullet out but didn't have enough force to seal the side of the case against the chamber wall causing blowby. Thats the black you see.

Shoot Wolf in an AR and you can see where the sidewalls of the steel cases tend to be discolored more then brass one's would with carbon.


I'd put my money on this.
After reading all the stuff here that I could find and ya'lls responses I'm betting ya'll are right too.  I've shot umpteen thousands of rounds of wwb, and this is only the second issue I've had.  I got a bad lot a few years ago, Had I think 3 in one box that just wouldn't fire.  I pulled the bullets, they had a normal charge, bad primers I guess.