I'm an avid reloader and I about fell over when I saw the price of dies for the 450BM. I see lots of threads regaurding modifiying the 45-70 FCD for 450 BM, I'm comfortable with that infact I've modified one before for making short 35 rem rounds (stupid Indiana Deer regs)..
What about the other dies? I saw something about using the expander die for a 45 acp and I think some are using 45 colt? What sizing die are you guys using?