What MD said.
Unless you're wanting to be sure the gun went off when you jerk the trigger. I like the Lyman 457125 and BP, 30:1 alloy. It leaves a mark, trust me. They say it runs around 500 grains depending on what your source reference is, but with the softer alloy I get about 530 gr. There is load data out there for smokeless that runs comparable pressure and velocity in case you're askeerd of Lord Black.