Pyrodex® RS Powder - Loose Black Powder Substitute (1 LB.)Pyrodex Powder is a powerful, highly efficient black powder substitute. Pyrodex Powder comes in a re sealable one pound bottle, in three distinct granulation types: Pyrodex RS (Rifle Shotgun) can be used in all calibers of percussion Muzzleloading rifles and shotguns. It has a extensive application of use, and is the most versatile powder in the Pyrodex line. Like all grades of Pyrodex, it burns cleaner and produces less fouling than black powder. RS