My stress, throughout this thread, has been on guns that have been modified. Guns which, if we were in a country which had a proofhouse and proof laws, would have to be submitted for reproof before they could be legally sold. Yes indeed, I do think that would be a good thing. Only my opinion. If yours is different . . . well, just go right on ahead and have Bubba bore out all the guns you want, and go right on ahead and shoot modern shells through them. You're the one taking the risk, not me.
Larry where are the dead and wounded caused by all these dangerous barrels? I know one person that has had a barrel burst and I hang around a bunch of shooter and hunters. I know many that were killed by auto accidents, general aviation small aircraft, motorcycles. Swimming pools are certainly more dangerous.