Manufacture of IMR powders dates again about 200 yrs when the business was at first founded by E.I DuPont. Readily available for use in several reloading applications, the IMR series of powder is trustworthy by reloaders all around the world.IMR 4227 Powder in inventory now will be imr 4227 the Magnum Pistol Powder from the IMR lineup. If it sugges