I would hardly call that "case failure?" The chamber is in the barrel itself and that did not come apart. The fact that the head of the case came off is just collateral damage due to the pressure. Something had to give. I would be willing to bet that had that action been a solid benchrest type action with no opening for a mag well and a lot of metal above the loading port that the damage would have been less severe. Richard
The case failed to hold the pressure (even though beyond design limits) so yes it is a case failure. The pressure started to split the action right behind the barrel tenon where it is only 1/8" thick. If it doesn't go to the mag well it will continue to split the action at another weak point, right down the bolt raceways (as seen in picture). Single shot or repeater wouln't make a difference, diameter of the action yes. Both Remy and Savage have hardened actions, much harder then the barrels (you have drilled and tapped them), therefore more brittle. You ever wonder why the 700ML has such a long barrel tenon and the end of the bolt isn't enclosed in the action or barrel? I think it is mentioned in Remingtons patent for the 700ML. Just a little bit of design people do not see
Here is another one, Savage model 12 in .223,
The tricky stuff is best left to those who are highly experienced in operating at the ragged edge of stability and sanity.
I have been present at several catastrophic gun failures, 1 ML and that was Black powder, 1 revolver and 2 bolt guns. Not the kind of thing you want to be close to when it happens. Remember, always safety first. those failures don't count the shotgun barrels I've seen "banana" peeled from an obstruction. 10