Manufacture of IMR powders dates again more than 200 a long time when the business was initially Established by E.I DuPont. Obtainable for use in lots of reloading applications, the IMR number of powder is trusted by reloaders all around the world.IMR 4227 imr 4227 Powder in stock now will be the Magnum Pistol Powder while in the IMR lineup. If it