I'm making the Lyman boolits from straight WW for my brothers gun and have to heat treat them or he gets alota lead in the barrel. I'm thinking about buying the Lee gas checked mold for the hotter loads. The 50 cal gas checks are very pricey. $50 at Midway, $42 for Gator checks. Still cheaper and more fun then jacketed bullets.
If you want to shoot full power, I would go with the Lee checked mold and then heat treat the boolit. Thats what I'm going to do.
If you just want a lighter load, go with the Lyman and heat treat them, then just pan lube and you wont need a lube/sizer.
Lyman #49 manual has cast 500 loads in it.