A true magnum spherical rifle powder, it is excellent with weighty bullets in big, overbore rifle cartridges. US869 is usually a dense propellant that enables the shooter to make use of plenty of powder to build utmost velocities in cartridges such as the 7mm Remington Extremely Magnum, 300 Remington Extremely Magnum, 30-378 Weatherby Magnum and ot