I would be more interested in examining the actions after that torture test than worrying about the split barrels. How well did the action vent the gases, and what sort of shape is the receiver in after the fact? Any barrel can split from high pressures, some individual barrels are simply stronger than others. I'll bet not one of those barrels was worth squat after that test. Also betting that some of the receivers are toast as well. Regards, Eagleye.