Introducing Vectan AS Smokeless Gun Powder, the AS is a fast-burning powder with colored flakes. AS is formulated to provide high energy and is ideal for 12-gauge target loads and light high-velocity field loads. This powder is a similar burn rate to WST, Green Dot, and American Select. This does not mean that it is a direct substitute for these powders. Warning About Smokeless Powder:Do not exceed the loads displayed in the reloaders guideNever mix any two powders regardless of type, brand, or source Never substitute any smokeless powder for Black Powder or any Black Powder substitute