Vihtavuori N540 High-Energy Smokeless Rifle Powder is a universal powder for a wide variety of medium-sized calibers suitable for both hunting and target shooting. Ideal for cartridges from .223 Remington to .308 Winchester and .30-06 Springfield with heavier bullet weights, it's incredibly accurate and clean burning. Its 1mm length and 1mm diameter meters well in reloading equipment and makes loading super-easy. Universal powder Ideal for cartridges from .223 Rem. to .308 Win. and .30-06 Spr. Works well with heavier bullet weights 1mm length and 1mm diameter Meters well in reloading equipment