WHAT DOES HODGDON US 869 POWDER CANADA MEAN?

A real magnum spherical rifle powder, it is superb with weighty bullets in significant, overbore rifle cartridges. US869 is actually a dense propellant which allows the shooter to make use of ample powder to develop optimum velocities in cartridges like the 7mm Remington Ultra Magnum, 300 Remington Extremely Magnum, thirty-378 Weatherby Magnum and