But you can always reload great grandpa’s musket with some homemade gunpowder. All kidding aside ... that go into this experiment are ammonium nitrate and potassium chloride.

or by the reaction of ammonium nitrate with potassium hydroxide or chloride. Early uses of KNO 3 included an oxidant in gunpowder, a preservative for meats and other foods, and a medicine for treating ...