An acquaintance has a 54 caliber CVA muzzle gun. It has been converted to ignite with 209’s. He has used round balls and Thompson/Center maxi-balls with no success to speak of and also BP and Pyrodex. The rifle is topped with a ‘scope and it is being shot from a bench. He was wondering about hollow base slugs for this critter. Anyone use them, are there any molds available—or any other thoughts? Thanks…BCB