Originally Posted by Paul Harm
Ted, that barrel looks like something was lodged in the bore, not high pressure. High pressure loads have the chamber opened up, not the bore. Now, if the reason for your post was to show a gun with very thin walls, that's a little different. But then who in their right mind would shoot a gun with .018 barrel wall thickness 9" from the breech ? That's not a over pressure question, but one of sanity.

There exist English 12 bore guns proofed at .018 wall. If the correct ammunition is used, no big deal. Unless you are me, and bang the thing into a tree taking a leak in the woods.

A man has just got to know his limitations.

I posted the blown up American gun as it doesn’t seem to have excessive wall thickness.

Best,
Ted