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Lymans 2nd edition Black powder Handbook& Loading manual lists charge volumes of 60- 120 grs. with Pyrodex RS or Goex 2Fg powders for the 385 gr conical. This data was for a 50 cal. with a 32 inch barrel with a 1-32" twist. I'd probably start around 80 to 90 grains and go up from there.
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