I just checked my copy of Lee's Modern Reloading, and I can't see why I can't use .45 Colt dies to reload .45 Schofield cartridges. The case diameter is exactly the same (.480). The bullet diameters are also the same. The only difference seems to be that the .45 Colt case is longer, and the .45 colt rim is .512 rather than .525 for the Schofield. It looks like the .45 Colt dies will work for the Schofield but not the other way around. It does look like I'll need another cartridge conversion kit for my Dillon RL-550B. I don't believe the Schofield rims will fit the Colt shell plate. I'm reloading for a Cimarron (Uberti) Richards Mason 1860 Army Cartridge Conversion revolver. Comments?