Manufacture of IMR powders dates back above two hundred yrs when the business was at first Started by E.I DuPont. Obtainable for use in many reloading programs, the IMR number of powder is dependable by reloaders all around imr 4227 load data the world.IMR 4227 Powder in inventory now is the Magnum Pistol Powder during the IMR lineup. If it states