dearmer,
I can agree with your faith in the ability of people to cover up for an accident; but when I had to reduce the speed of lightly constructed 22 HP bullets in my 5.6X61R vom Hofe to 3000 fps, so it would group, I still changed from 4350 to 4895 rather than endanger an heirloom rifle.
It's possible some with ringed chambers could have this same ability; consequently my interest in the real cause and conditions, if any, for chamber "ringing". The point of the C4 story was " lesser" explosive worked while the High explosive didn't. It was OK though, the purpose of the quarry was for training( even though we did use the rock, training other troops) and that provided a good lesson.
Nike
