Winchester StaBALL HD is a temperature-insensitive, double-base, BALL Powder, stable in extreme-hot or -cold conditions. This slow-burning magnum powder provides optimal loading density in large capacity magnum cartridges appropriate for the burn speed, which is ideal for 6.5 PRC, 7MM Remington Mag, 300 PRC and many more. Specifications and Features: Brand Winchester Powder Category Powders Series Rifle Powder Model Staball HD Match Firearm Type Rifle Size 1LB