I have a C. Sharps 1875 chambered for the 50-140 Sharps, heavy 34" barrel with 1/22" twist. I have a custom mold for a bore riding 795 grain cast bullet w/1-20 mix. My standard load is 120 grains of 1FG, 1 wax wad, 1 card wad. I want to put together a milder load using SR4759 smokeless powder. I found 1 load using 45 grains of SR4759 but it was with a 438 grain bullet and kapok filler. obviously my bullet is much larger so I wondering how much SR4759 powder & or filler to use with my bullet. I know there was a load using a 700 grain bullet, but I can't find any info on that using SR4759 powder. Any information would be much appreciated.