Manufacture of IMR powders dates again above 200 many years when the business was originally founded by E.I DuPont. Available for use in several reloading apps, the IMR series of powder is trusted by reloaders all around the world. IMR 4227 Powder in inventory now would be the Magnum Pistol https://beckettoopmj.blogofchange.com/28254681/imr-4227-powder