Manufacture of IMR powders dates back around 200 decades when the business was at first founded by E.I DuPont. Accessible for use in several reloading applications, the IMR series of powder is reliable by reloaders all around the world. IMR 4227 Powder in inventory now will be the Magnum Pistol https://imr-422704681.shotblogs.com/imr-4227-powder-41805273