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making rocks into fine powder

May 03, 2016 Begin by grinding charcoal (grilling charcoal works fine) and sulfur to a fine powder. Then grind the tree stump remover into a fine powder. Finally, gently mix the saltpeter, charcoal, and sulfur together in a 75/15/10 ratio (nitrate/charcoal/sulfur). Making gunpowder with …

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