What caused this?

[steve]

These were found at the range and I thought it would be an interesting topic. I'm in the process of locating owner and informing them of what I found (in case they don't already know). Theses are .45 caliber CCI aluminum cased factory rounds (not reloads).

 

[JohnAL]

If they are not reloads then all I can do is guess that something is wrong with the chamber. I have shot several hundred of the CCI Blazer aluminum case .45 with no issues. I even reloaded 25 just because they said not to. They worked just fine too.

 

[Mr. Katanga]

Got a picture of the primers, might be a glock barrel with lots of lead being shot through it without cleaning. Glock barrels ( loose chamber) plus a build up of lead in the poly rifling could build up a lot of chamber pressure and lead to case failures on an aluminum case. Ive loaded once fired aluminum cases too and never had a problem. Also have had a lot of commy 7.62x54r and 7.62x25 with blown out cases in nagant rifles and tokarev pistols and it never hurt anything.

 

[FrankT]

yeah those damn Glocks and their unsupported chambers! LOL

 

[steve]

My thoughts too John. I don't reload or shoot reloaded ammo so I'm very familiar with issues that accompany reloading. Am I correct that if the problem were with the reloads they wouldn't split almost exactly the same on each round? I understand that the press may somehow weaken the case in the same manner on each but would they look almost identical after firing?

 

[steve]

Here's the primers Mr. Katanga.

 

[Mr. Katanga]

That looks like a glock primer strike that was just slightly out of battery, but its hard to tell. Aluminum has interesting properties that while it is light and strong, it has a very short fatigue life which is why they tell you not to reload them. If those were reloads after firing in a loose chamber, resizing, and then firing again the fatigue could be enough to burst a case even with normal pressures and chambers. Thats my best guess but I would have to see the gun to get s better idea. Luckily it was a case split not a case failure which is what leads to the famous kabooms that tend to blow the mag out the bottom and usually ruin the lower.

 

[M.O.A.]

If they are not reloads then all I can do is guess that something is wrong with the chamber. I have shot several hundred of the CCI Blazer aluminum case .45 with no issues. I even reloaded 25 just because they said not to. They worked just fine too.

Why does this not surprise me ?

 

[bcp280z]

Did this occur when you were shooting? How's the hand?...gun?

 

[kendive]

Never seen that before but I had a Just Right Carbine in .45 and it was a POS and did this to the brass. I don't own it anymore... Will never buy one again.

 

[NWFLYJ]

I have over 3000 lead boolits thru a glock with no leading issues, if the projectile is sized correctly together with good lube, the legend of not being able to shoot lead in a glock is not true.

http://castboolits.gunloads.com/showthread.php?t=33855

 

[Mr. Katanga]

I shoot lead all day in my glock with the factory barrel. They say that for liability issues because technically the build up of lead in a polygonal rifled barrel can possibly build up enough that it can increase pressure when a jacketed bullet is shot and possibly lead to a problem. I just shoot a jacketed bullet through every once in a while to clear it out. The most accurate bullets outta my glock are 180gr lead.

 

[steve]

Did this occur when you were shooting? How's the hand?...gun?

I wasn't there when these were fired, someone brought them to me today. I am looking into who actually fired these and will talk to them tomorrow.

 

[dead-bird]

Don't thing these were fired from a Glock.
There is no rectangular fireing pin impression from the breach face.

 

[JohnAL]

Why does this not surprise me ?

When Obama brings this country to it's knees we might be happy to have a few aluminum cases around. :smile:

 

[M.O.A.]

Don't thing these were fired from a Glock.
There is no rectangular fireing pin impression from the breach face.

Good observation sir. And the firing pin on a Glock ain't round either.

 

[M.O.A.]

When Obama brings this country to it's knees we might be happy to have a few aluminum cases around. :smile:

Primers for those may be a little hard to get tho.

 

[Mr. Katanga]

I saw a slight rectangle but it wont look as pronounced as the normal glock rectangle because the cases blew before the rectangle formed. When a primer doesnt set off in a glock the rectangle never forms and looks like a round dimple. Ive been doing primer pathology on a couple glocks for the last few weeks and thats my best guess from that picture.

 

[Mr. Katanga]

Primers for those may be a little hard to get tho.

They use small pistol primers, load just like brass cases

 

[M.O.A.]

They use small pistol primers, load just like brass cases

Well Hell, I always thought they were Berdan primed instead of Boxer. Thanks