The different varieties of the Winchester 748 Smokeless Propellant Reloading Powder are specially formulated to provide the clean burning, temperature, flow rates, and velocities reloaders desire for different applications. A medium speed propellant, 748's lower flame temperature extends barrel life when compared to similar speed powders. The powder of choice for 223 Remington ammunition, 748 is ideal for a wide range of centerfire rifle loads, including 222 Remington, 30-30 Winchester, 30 Winchester, and up to 485 Winchester Magnum. Smart choice for home reloaders Medium speed propellant Lower flame temperature Designed for small and medium rifles Powder of choice for 223 Remington ammunition