I was reloading the other night and caught sight of a tiny crack, 1.5mm long max, at the mouth of one of my casings. Got me thinking: How dangerous is this?
I can understand how case head separation compromises the whole pressure seal of the chamber, but in trying to visualize what would happen upon firing a case with a slight crack in the mouth, I couldn't see how it would pose a problem. The case would expand, but it would meet the chamber before the crack got a chance to widen much; it seems to me the seal would stay intact... Am I wrong?
I can understand how case head separation compromises the whole pressure seal of the chamber, but in trying to visualize what would happen upon firing a case with a slight crack in the mouth, I couldn't see how it would pose a problem. The case would expand, but it would meet the chamber before the crack got a chance to widen much; it seems to me the seal would stay intact... Am I wrong?