I would think or should I say hope to think that someone grabbed the wrong box off their shelf or off a store shelf...Since it's a 7mm bore I don't think it would be in any danger of coming apart but it a miracle that the case neck didn't split...that seems like it would be alot of stretch..if there was only a few of them then they likely saw the error of their ways and stopped while the gittin' was good..had a friend who did it with 7mm/08's in a .308, couldn't figure out why it wouldn't group worth a darn..amazing