The N320 formerly known as 3N22 is a fast burning porous handgun powder. N320 is one of our most popular handgun powders and can be used for a wide range of pistol calibers from .32 to .45. It is most commonly used by sport and hobby shooters such as Cowboy Action shooters but as a very reliable gun powder it is also suitable for authority applications. The powder type is tubular with grain dimensions 11 mm x 08 mm (length x diameter) and as all our reloading powders it includes the added decoppering agent