Premod70 wrote on Jul 24
th, 2020 at 5:55pm:
....I did state the brass will withstand low pressure loads in itself....
....Once ruptured the gases will destroy the action at normal pressures, gases, not pressure destroyed the action.
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.