Premod70 wrote on Jul 24^th, 2020 at 5:55pm:

I think I'll just respectfully disagree. I did have a couple of new thoughts based on your comments. 

I my experience, any cartridge, high or low pressure, will not develop anywhere near its rated pressure if it is not contained in a chamber and most need some barrel length. It will basically only create enough pressure to release the bullet from the neck of the brass and the powder rarely burns efficiently, just as low pressure loads can leave unburned kernals in a barrel, only more exaggerated. 

Back to the Swedish Mauser example in the castboolits link. I think it is apparent that the fractured metal of the action is bright, unaffected by environment or temperature. It does not appear gas cut. As I pointed out a bit ago, the front ring of the action failed, but clearly gases did not cut through the barrel shank that was in the front action ring and even the remaining brass case in the chamber does not appear gas cut in the direction of the receiver ring failure.

When people comment about ringing a barrel, there was no gas rupture that destroyed that barrel. It is forever damaged, but not ruptured?

Anyway, those are just my thoughts. And, I'll edit to quickly add that I see other visual note worthy signs in that Swedish Mauser example that I have been referring to.

craigd wrote on Jul 24^th, 2020 at 6:35pm:

Sorry, I can’t find the link to the Swedish Mauser. My comments are directed to the 03 Springfield.

moodyholler wrote on Jul 25^th, 2020 at 10:08am:

Depends on the cartridge. It's a pretty versatile powder and shows up in things like the Hornet cartridges as well as the big bore stuff.

Probably best example is 300 Blackout. Bullet weight from 125-250 grains, pressures from the high 20's to mid 50's all compressed loads, some as high as 120%.