Products Overview: IMR 4227 PowderManufacture of IMR powders dates back again in excess of 200 many years when the business was originally Established by E.I DuPont. Accessible for use in many reloading purposes, the IMR series of powder is dependable by reloaders all around the world.IMR 4227 Powder in stock now is definitely the Magnum Pistol Pow