Hi Charles. The dented casing could have also been the result of a short cycle, which occurs when the shooter is operating the bolt in a very hurried fashion. Basically, the casing does not get fully ejected and instead is caught and squeezed by the operation of the bolt in preparation for the next shot. The shooter would then be forced to operate the bolt a 2nd time to finally eject the spent (and now dented) casing.
I'm not saying I adhere to this theory, but it is something to consider.
Thanks Bill, yes that does appear to be another possibility. However I would expect the dent to be different with respect to the end (or top edge if you will) of the cartridge if that were the case. Looking at a photo of CE 543, we can see the top edge appears to have no damage. The dent appears to have come from the side. I could be wrong, but if a short-cycle were the cause then I would expect the top edge to show some sign of the cartridge being squeezed. Maybe some curling or other damage. Here’s a photo of CE 543:
