One of the primary benefits of reloading with Hodgdon Extreme H1000 Rifle Powder is the extremely slow burn. This powder gets high marks for over-bored magnums, including the 7mm STW, .30-378 Weatherby, and 7mm Remington Magnum. However, the powder also works well for heavy bullets, delivering high velocity for cartridges like the .270 Winchester, .300 Winchester, and 6mm-284.