Since its US introduction in the late 1990's, the Swiss Black Powder has become the powder of choice among black powder competitors. Unsurpassed quality with greater power, lower standard deviations and superior performance results in higher competition scores. The factory for the Swiss black powder is ISO 9001 certified. 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.