Thread: Fl sizer not sizing the neck?

Been out in the shed. The dia of sized cases with the neck expanded ran from 0.335" CAC down to 0.331" Winchester so the problem is the die not reducing the neck enough to allow the expander to do its job. CAC cases with the slightly undersize Greek projectile seated 0.335". My Lee loader reduces the OD of sized cases to 0.331". This is way less than your die delivering 0.336".
That is the problem identified. The fix is a new die either FL or perhaps a Lee collet die.
GPM.