I must say, this thread has completely lost me. Isn't the dishing of the primer, as observed by Chapman and as seen in the HSCA composite, the more significant issue? It would be conclusive evidence that CE 543 was a dry-firing shell, yes? The dent could be why CE 543 became a dry-firing shell - i.e., it was no longer suitable for reloading. The dent could have happened during practice with the M-C or CE 543 could have simply been picked up someplace by Oswald. Yes, the dent perhaps could have happened when CE 543 was fired on 11-22 - but not if the primer shows evidence of more than one firing pin impact. What am I missing?