Frank, nice link BUT I disagree completely when it said to measure by weight, not volume. Black powder always has been measured by volume. I've shot on the National Muzzle Loading range for over 20 years - pistol, rifle, and shotgun, and have never seen anyone weigh a charge, they all measure. When shooting my 12ga trade gun [ flintlock smooth bore ] my normal load is 65grs of 3F and RB or 1oz of shot. If I go to 2F, for best accuracy it's 90grs. You'll fine for the same velocity you'll need about a 1/3 less powder if going from 2F to 3F, but it will raise pressure up to 2000CUP.
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Paul Harm
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