Of course we're still all speculating. However, it's interesting to compare the photo of that hull to a couple hulls we know to have blown due only to what was IN the hull, not any possible obstruction. I refer those who may have a copy of the magazine to Double Gun Journal, Winter 1999, and the destruction test involving author Sherman Bell (Finding Out For Myself, Part II), with technical assistance from ballistician Tom Armbrust and doublegun smith Dennis Potter. The hulls in question look nothing like the above example. They're badly twisted as well as being torn. But that's what nearly 30,000 psi pressure--the load required to complete the destruction of the gun in question--will produce.
I no longer have the magazine, retaining only a Xerox copy of the article for my files. If anyone has it and can reproduce the photo, posting it here would provide an interesting comparison.
