Haven't posted here before but have a lot of time on other sites. I want to give cast bullets in my .308 Winchester a try. Not looking for jacketed speed but 1600-1900 fps or so with 150-170 gr FN bullets. I know I can run the GC's faster but the non GC's are cheaper. Do I need some sort of die that will bell my case mouths slightly so I don't shave lead when seating the bullet ? I have a loadbook with Lyman and RCBS load data so I'm pretty good there. Appreciate all input.