Measure a sized case, if it does it on new brass you got a bad die. The base of the die shouldn't even really touch the base of new brass or theres a problem with the new brass, measure a piece of new brass before you size it.
I size my 30-28 cases back .004 at the base its tight but it doesn't shave the brass.
Last edited by sherm_61; 03/13/24.
