Production of IMR powders dates back over 200 yrs when the company was originally founded by E.I DuPont. Readily available for use in lots of reloading programs, the IMR series of powder is trusted by reloaders all around the world. IMR 4227 Powder in stock now could be the Magnum https://imr422726936.blazingblog.com/27805619/imr-4227-powder