Accurate 1680 Smokeless Rifle Powder is a fast-burning, double-base, spherical powder made for large capacity, high-performance handgun cartridges like the 454 Casull, 460 Smith & Wesson, and 500 Smith & Wesson. Accurate 1680 is also great for .22 Hornet, 7.62 x 39, and other low capacity rifle cartridges. Fast burning Great for 454 Casual, 460 S&W, and 500 S&W Best with low capacity rifle cartridges