WHAT DOES HODGDON US 869 POWDER CANADA MEAN?

A real magnum spherical rifle powder, it is superb with large bullets in significant, overbore rifle cartridges. US869 is really a dense propellant that enables the shooter to employ sufficient powder to generate most velocities in cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum and Other indiv