Production of IMR powders dates again over 200 a long time when the organization was at first founded by E.I DuPont. Accessible for use in many reloading programs, the IMR number of powder is dependable by reloaders all across the globe.IMR 4227 Powder in stock now could be the Magnum Pistol Powder within the IMR lineup. imr 4227 If it states Magnu