Case Head Separation

[@shag126]

Good video. I've read the reason why 303 separates early is the gun has significant headspace. This allowed it to chamber under battle conditions, I.e. Dirt in chamber, but it leads to early case head separation during reloading. It can be delayed by neck sizing only and I've seen a trick where an o ring is put around the case at the base to limit stretching, but this was only with 303.

[@ivarwb4115]

Great video, very illustrating. Any theory on the reason for the separation?

[@hamzamehr1499]

Why exactly at that point case head separation occurs? I've seen other bullets which show signs of case head separation at approximately same point distance from the web. I know why it occurs ,I don't know why at that point.