748 is our top pick for .308 ammunition. The low flame temperature of 748 extends barrel life compared to other similar speed powders. It is also ideal for a wide variety of centerfire rifle loads, including 222 Remington, 223 Remington, 30-30 Winchester, 30 Winchester, and up to 485 Winchester Magnum. Belmont’s 748 is a quality clean burning spherical smokeless powder manufactured in the USA.