CFE 223 is a spherical powder containing “Copper Fouling Eraser” an ingredient originally developed for military propellants to greatly reduce copper fouling in barrels. Your barrel will give you its best accuracy for longer periods between cleanings so CFE 223 is great for Match Varmint and AR-15 competition shooters. It meters accurately to help yield consistent loads for top velocities in popular cartridges like 204 Ruger 22-250 223 Remington/5.56mm NATO 6mm PPC and 308 Winchester/7.62mm NATO.