Winchester .22 Black Powder Blank Ammo is extra-loud and best-used for longer distances or in windy conditions. Also, the black powder gives a puff of smoke at the report and is ideal for use at sporting events, especially track and field where visual confirmation of the shot is helpful. These blanks are also used in gun dog training to simulate a shotgun firing. Since this is a black powder cartridge, remember to clean your pistol after each use. Available in boxes of 50 rounds.