Goex Cannon Black Powder is a special granulation for optimum Cannon performance. While Goex has improved manufacturing processes and material quality, they have manufactured black powder using traditional materials to provide the same great ignition characteristics and uniform speed that master shooters and hunters have relied on for over 200 years. Warnings from the Manufacturer: Do not exceed the loads displayed in the reloader's guide. Never mix any two powders regardless of type, brand, or source.Never substitute any smokeless powder for Black Powder or any Black Powder substitute.