Production of IMR powders dates back around 200 years when the company was initially Launched by E.I DuPont. Obtainable for use in several reloading programs, the IMR number of powder is trustworthy by reloaders all around the world.IMR 4227 Powder in inventory now will be the Magnum Pistol Powder during the IMR lineup. If it imr 4227 claims Magnum