Creation of IMR powders dates back around 200 decades when the business was at first Started by E.I DuPont. Obtainable for use in many reloading programs, the IMR series of powder is reliable by reloaders all around the world.IMR 4227 Powder in inventory now is the Magnum Pistol Powder from the IMR lineup. If it suggests Magnum, 4227 powder will im