I'd like the Preacher to tell us who made the notations in red pertaining to the photos above.
Since he obviously does not yet have the blown barrels in hand for in depth metallurgical analysis, it is apparent that these notations in red must be based upon visual analysis and observation of the photos alone. The Preacher attempted to thoroughly discredit me for saying much the same thing in his earlier locked thread. He cried that it wasn't possible to know the cause without his precious metallurgical analysis, and also felt that the missing piece of chamber would be crucial to learn the cause of this burst... something that I could never possibly see from just looking at photos. So just what is going on here, and who made these observations and this post mortem???
I still think the dark spot that is now acknowledged to be the initiation point of the burst was probably due to an inclusion or internal flaw in the barrel steel such as rolled-in scale. That dark spot would have been just as thick as the clean area immediately adjacent to it. If the braze joint was that compromised ever since the gun left the manufacturer, I think odds are that it would have digested some higher pressure ammunition over those many decades, and blown sooner. That was why I seriously doubted that these barrels had undergone a twice normal pressure proof test, as someone asserted.
I also said much the same thing pertaining to the tearing of the hull due to suddenly being unsupported by the part of the chamber that suddenly departed. I said that earlier in this thread, but that post got deleted, probably due to complaining to Dave by the Preacher, or one of his loyal flock.
Apparently, he didn't like me mocking his lack of knowledge to analyze a barrel blow-up, and his hysterics over the idea that a burst like this could result in a piece of shrapnel hitting a child in the skull... and oh my gosh, there would be a civil suit because the defendant didn't measure the barrel wall thickness in this area... which incidentally cannot be measured with conventional wall thickness measuring tools. He said that even though he has admitted that he continues to shoot his only Damascus barreled gun, an L.C. Smith with thin and pitted barrels. Gotta get stuff like that deleted. We can't go on speaking the truth around here, or someone might look like a disingenuous ass.