WHAT DOES HODGDON US 869 POWDER CANADA MEAN?

A true magnum spherical rifle powder, it is superb with large bullets in major, overbore rifle cartridges. US869 is often a dense propellant that permits the shooter to make use of ample powder to build most velocities in cartridges like the 7mm Remington Ultra Magnum, three hundred Remington Ultra Magnum, thirty-378 Weatherby Magnum and Some other