John: To my knowledge, neither shooter measured the wall thickness nor made any other effort to diagnose the blow out. I contacted the gentleman using the Winchester No-Tox and had no response. That is why I so appreciate that a few fellas were interested enough to send me their barrels for an evaluation, but frustrated in the knowledge that there are a lot more out there and simply for the cost of shipping one way we could develop a data base of 'disasters afield'.
This Sterlingworth had been honed to .739" with resultant wall thickness of .018"
I've got a Smith 4E Chain Damascus getting radiography right now that was honed to .016