If the cases are military and have been fired in something other than a bolt action rifle, perhaps a machine gun, wouldn't they come out extra long/over sized?
Is the solution to measure the case length, then trim to the correct trim (or maximum) length, then put the case through the (new) full length resizing die?
I know that is arse about face, but if the cases are massively over length, the top of the die will donut them every time.
I had a little adventure with some second hand Hornet brass a while ago which was hugely long, like 2.125 (or 2.225 I can't remember exactly), for a case with a trim length of 1.393 and max of 2.014. This is all from memory, I'm in the whare at the moment with no reference material. Sure the Hornet is a milk bottle shape with no real shoulder, so it's prone to stretching, but I couldn't work out how they could grow that much inside th chamber???
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