Winchester StaBALL Match is a temperature-insensitive, double-base, BALL Powder, stable in extreme-hot or -cold conditions. This powder provides optimal loading density in cartridges appropriate for the burn speed, which is ideal for high-BC heavy for caliber bullets in 223 Remington, 224 Valkyrie, 22-250 Remington, 308 Winchester, 30-06 and many more. Typical of a BALL powder, precise metering contributes to consistent velocity and pressure with lower standard deviations, ingredients that are paramount to match grade accuracy!