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!