I used the search tool trying to gain some loading data for the 45-70 using multiple round balls but no info was found. Rifle will be a Marlin Cowboy, round balls will be lead .457 {a little small I know but I'm not looking for a target load} used in the Ruger Old Army. Will use an Ox Yoke wad over the powder, probably Unique. Up to 10 grains with 2 balls and 7 or 8 with 3 balls. A roll crimp will be used on the top most ball. I'm sure it's been done by lots of folks, including the Army back in the day.
Just looking for advice, tips, pitfalls, or hell no don't do this...... I'm bored!