WHAT DOES HODGDON US 869 POWDER CANADA MEAN?

A real magnum spherical rifle powder, it is superb with significant bullets in huge, overbore rifle cartridges. US869 is a dense propellant that enables the shooter to use plenty of powder to produce most velocities in cartridges such as the 7mm Remington Extremely Magnum, three hundred Remington Ultra Magnum, 30-378 Weatherby Magnum and Many other