Manufacture of IMR powders dates again above two hundred decades when the business was at first Established by E.I DuPont. Available for use in many reloading programs, the IMR series of powder is reliable by reloaders all around the world. IMR 4227 Powder in inventory now is definitely the Magnum https://imr422715814.jts-blog.com/27303287/imr-4227-powder