I was kicking around the idea of building a 450 Marlin in a Ruger M77 bolt gun for a handy little bear gun. Looking at availability of brass doesn’t look too promising. E.R. Shaw makes barrels and can fit and tune the rifle but the brass is key as you can’t make the brass from anything else. Thinking a 458X2” American might be a better option for such a project as they are pretty much the same.
