....I have come to suspect bore obstruction as a main cause for failure....
I think this is a good point. I really didn't see Ballistix's problem as a catastrophic failure. Serious yes, but I believe that was a gradual failure that would have reared it's head before it became catastrophic.
No, I wouldn't want to take over and run his gun through a few rounds of skeet just to see, but that barrel certainly did not explode like it had an obstruction in it.
Apparently, the bulge in that Clarke 20 bore didn't show up until after the split formed, so it's no wonder it passed proof. Just a snap shot in time, nothing more nothing less.
Just thoughts.
