If a marked up case shows tight in the body you can push the case in a bit more putting a washer on top of the shell holder, knocking the sized case out with a rod.

This for size test only, push it in further likely to set the shoulder back . May give a clue to what's tight though. . Dies will size hollow brass won't reduce the diamater soiid brass at the base . Tight at the base driving in further likely cause a stuck case very difficult to hammer out.

Way I found out my 25 Kraig was base tight cut a case in half chambered the bottom, tight with little body and no neck. I thought it was the neck, having sized the cases down from 30/40.

It's a puzzle,have to keep at it until solved.

Boats