Looking at the latest posted pictures, the forcing cone and immediate area ahead of the forcing cone look more like bore thickness than common chamber thickness. I think some posters agree with me that someone has been in that barrel with tools to which he should not have had access. Remember it may be hard to measure the wall thickness of the blown up barrel, but the other barrel is intact and ripe for measuring. On another point, the straight wall rupture at the rear of the blowup area is, as a poster suggested, along a weld line. However, in my opinion, that rupture at the weld line is not a result of a weak weld, but a result of the "peel back" and high speed bending of the ruptured area farther forward. I am still willing to test the primer in the powder possibility as I mentioned in the previous thread, if posters will donate, at most,six good or bad shotguns to the tester. As I mentioned, I will return the shotguns to their owners after testing if requested. After reading KYjon's post stating that a primer, ignited simultaneously with the powder, would cause pressure to go up "a tad", I am even more interested in conducting a primer in the powder test. I have alway heard that an igniting primer in the powder charge creates a serious pressure spike but have never read about the results of such a test. I think the results of such a test would be enlightening and a good addition to Sherman Bell's research.
