"Just out of curiosity, what would happen if one attempted to fire a round that had too much crip on it?"
Guess too much crimp would pinch the nose of the bullet off; short of that, not much. All we need to understand about crimping a 9mm is, "not much."
9mm bullets are light and the recoil is quite modest. Pulling bullets isn't a problem if for no other reason than the magazine's front wall prevents it. Nor is set back in the magazine likely to occur, the recoil is far too little for that (it IS a puny round!). So, all we really need is to remove the case mouth flare completely to insure smooth chambering.