I'm looking for a way to bump up 250 grain .452 pistol bullets to .454 diameter. They're going to be used in a muzzleloader without a sabot. A .452 bullet is just loose enough that it won't stay firmly seated on the powder. Other than an old CH Swagomatic that I made a few .38 caliber half jackets on, I have no swaging experience.
I have an older Rockchucker press. Is there some sort of die that I can use with it to make this happen?
Any and all replies with info, suggestions, and questions will be appreciated.