I am testing extremely lite recoil loads in 40-70 government. I gathered from other comments that unique is a good powder to do this with. What I have not determined is whether to fill in the excess case with a filler of some sort. I have read comments to always use a filler unique, and other comments to never use a filler with unique. I am not looking for load data or recipes. Suggestions/Comments on bullet and powder are welcome.
Bullet 190gr
Marlin 1895CB