Huvius, I have to use 140 grains of Goex FFFg in the 5-dram Tolley 10-bore 2 5/8" rifle. With that load it crosses about 3" at 50 yards, but that's as hot as I'll go. I'd like to try Swiss if I can locate some. 150 grains of Goex FFg crosses 9" at 30 yards!

I easily tried 30 different powder, wad, and case combinations in this gun and the only thing to come close to FFFg was a heavy charge of Blue Dot in a roll crimped plastic case. It regulated, but I won't repeat until I can get it presure tested. I don't have my loading book with me so I'm not sure of the BP velocity. A Tolley chart from the 1880s listed 1300fps for a 5 dram load and roundball, but it took almost 1500fps to uncross with Blue Dot.