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  #111  
Old 11-17-2021, 08:56 PM
Jeremy2171 Jeremy2171 is offline
 
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Quote:
Originally Posted by Slamfire View Post
So much denial on this forum! And denial is infinite, and it seems to be intrinsic to the human condition.

Anyway, sure case heads, body splits can and do occur with old ammunition. And the reason is, gunpowder deterioration. That nitrocellulose breaks down into NOX, a spectrum of NO molecules. One of them in nitrogen dioxide (NO2) which is a horrible oxidizer. If you live in Los Angeles, that red haze, particularly noticeable when you fly in, I am certain that is all NO2 that came out of tailpipes. It used to cause all sorts of trouble when it mixes in the atmosphere and comes down as acid rain.




Nitrogen dioxide attacks brass. It is the primary cause of the green corrosion seen inside cases. Might be some other NO molecules causing troubles too, but NO2 is likely the major culprit.



So, a chicken and egg problem. Did the weakening of brass cause the kaboom, or did increasing pressures, due to burn rate instability, cause the case to fail where NO2 weakened it?



There is nothing good about old gunpowder, the stuff will cause your brass to corrode, in bulk it auto ignites, and it has, and it will, blow up your gun.

But, you believe none of this, right?

[img]https://i.imgur.com/JJsh6Tk.jpg[/img]

[img]https://i.imgur.com/aez1i91.jpg[/img]

Or the brass is just brittle from age...like in the 8mm yugo and Turk.
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  #112  
Old 11-18-2021, 04:50 PM
Slamfire Slamfire is offline
 
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Originally Posted by Jeremy2171 View Post
Or the brass is just brittle from age...like in the 8mm yugo and Turk.

Brittle because of age? How does age make brass brittle?


At least for case heads, which are not stressed. You could make a case for necks cracking over time. But case heads?
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  #113  
Old 11-18-2021, 07:26 PM
Jeremy2171 Jeremy2171 is offline
 
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Originally Posted by Slamfire View Post
Brittle because of age? How does age make brass brittle?


At least for case heads, which are not stressed. You could make a case for necks cracking over time. But case heads?
Or bad metallurgy or improperly annealed...

IF it failed due to pressure like you said then the case head and primer would show it...

It doesn't. That flaw in the brass was because the brass was no longer elastic and when the case stretched to fit the chamber the case head doesn't have the ability to stretch so the weak point is right above the case head where the body/head meet and it fails.
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  #114  
Old 11-19-2021, 09:47 AM
JPW99 JPW99 is offline
 
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If this problem is bad brass could it be fixed by annealing the hole case
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  #115  
Old 11-19-2021, 09:47 PM
Ammolab Ammolab is offline
 
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Originally Posted by JPW99 View Post
If this problem is bad brass could it be fixed by annealing the hole case
If you anneal the head?…they all will blow out. The head gets work hardened during forming, and it needs to stay that way.

You can’t fix a flaw in the brass buy annealing.
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