Hi, Mike,
I seen the results of a fair number of cases of firing a bullet into a bore obstruction and have never seen it blow apart a receiver, though a barrel split can break the receiver apart. Here there was no mention or indication of a barrel bulge or split; the damage was confined to the receiver.
I suggested that the OP get his friend to section that fired case. Or you can do that if you have an R-P .30-40 case handy; I think you might be surprised by how much cutting that extractor groove weakened the interior base.
Jim
I seen the results of a fair number of cases of firing a bullet into a bore obstruction and have never seen it blow apart a receiver, though a barrel split can break the receiver apart. Here there was no mention or indication of a barrel bulge or split; the damage was confined to the receiver.
I suggested that the OP get his friend to section that fired case. Or you can do that if you have an R-P .30-40 case handy; I think you might be surprised by how much cutting that extractor groove weakened the interior base.
Jim