Manufacture of IMR powders dates again in excess of 200 yrs when the corporate was initially 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 https://erickifcyt.blogripley.com/28322836/imr-4227-powder