The Vihtavuori N133 Smokeless Rifle Powder is a multipurpose powder for centerfire .22 cartridges and PPC caliber cartridges. N133 is a tubular powder with a medium burn rate. Excellent for .223 Remington and widely used in AR-15 platforms. One of the most popular powders in 100-200 meter benchrest competitions. Good for centerfire .22 cartridges Tubular powder Medium burn rate Popular for 100-200 meter competitive shooting