The Lathesmith GC punch is concave it lets the GC flex a little bit I think when seating.

And with my heavy slugs the punch was pushing the out side of the slug and squishing it making it to large to go threw the die. That is my guess any ways. the PB punch it flat and pushes evenly across the base of the bullet and my problem was solved.

Lathesmiths customer service is great I have talked to the owner several time since I started casting my own and he is good people.

I do not have any Magma dies

Last edited by funshooter; 04/25/15.