Alliant 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.