Every container of Alliant Smokeless Powder is backed by a century of manufacturing experience and the most exacting quality control procedures in the industry. Chemical composition, grain shape and size, and overall density are constantly checked and tested in a ballistics lab to ensure consistency. This new powder is designed for long range, 50 caliber rifle shooters. With superior velocity and the ability to burn cleaner (with less residue), Reloder 50 delivers lot-to-lot consistency and a density created specifically for the 50 caliber application. Warnings from the Manufacturer: Do not exceed the loads displayed in the reloaders 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.