RE: .45 die?
No, what we are asking is which 45 caliber cartridge. There is the 45 ACP, 45 Colt, 45 Smith & Wesson, etc. Where the difference comes to play is how the cartridge headspaces in the gun. The 45 ACP headspaces on the case mouth so you don' t want a roll crimp. The 45 Colt headspaces on the rim so you can roll crimp it.