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.
Power Pistol smokeless powder is double based, fast burning, consistent, economical and extremely accurate, making this powder an excellent choice for high performance semi-automatic pistols like the 9mm Luger, 40 S&W and 10mm Auto.
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.