I believe the rim of the .50 is too big. A .45 cal is probably doable, but, it might require a custom machined bolt head.
On a bolt gun you'd be better off going to a .458Win Mag or .450Marlin (a rimless .45-70). The twist rates are about right for heavier slugs.
I had considered a .458WM a few years ago for shooting BP. But, I realized I didn't like that kind of recoil anymore, especially in a light gun.
Bookmarks