WHAT DOES HODGDON US 869 POWDER CANADA MEAN?

A true magnum spherical rifle powder, it is superb with weighty bullets in major, overbore rifle cartridges. US869 can be a dense propellant that enables the shooter to use sufficient powder to develop most velocities in cartridges including the 7mm Remington Ultra Magnum, three hundred Remington Extremely Magnum, 30-378 Weatherby Magnum and others