Here we go again! I really don't care whether your state allows the gun or not! What I asked was has anyone used one.
To answer the question as to what load.......25 grs (by volume) of Triple 7, a pure lead .454" round ball with a Oxyoke patch between the ball and powder, Boe Butter over the ball. I have not run it over the crony yet, but expect that 18" barrel to pick up some velocity.
Years ago I carried an original 1858 Remington as a backup while ML hunting. On more than one occasion used it close in for Florida deer. Unless you have seen what a pure lead ball will do out of the handgun you can only guess as to how effective it is. My regular ML is a .50 TC Grey Hawk, but I use the little Remington as a boat gun and walking gun. Shots 50 yards and less........James