I have had 3 Dan Wesson 445 Supermag revolvers. I actually wore the bbl. out of one. I settled on the 220gr. FPJ Sierra., WW296 powder, & I feel Fed 155 lg pistol primers are a must. I used standard 44 mag carbide dies with no problems. Today we have Lil'Gun powder which I would use if I were to use heavy bullets. My 445 Supermag days go back to when you had to provide proof of purchase of a pistol to get 50 pcs. of brass headstamped "445 Gates".