Creation of IMR powders dates back around 200 years when the corporate was at first Established by E.I DuPont. Available for use in many reloading applications, the IMR series of powder is trusted by reloaders all around the world.IMR 4227 Powder in inventory now is definitely the Magnum Pistol Powder within the IMR lineup. If it says Magnum, 4227 … Read More