Product Overview: IMR 4227 PowderCreation of IMR powders dates again in excess of 200 years when the company was at first Started by E.I DuPont. Readily available for use in several reloading programs, the IMR number of powder is reliable by reloaders all across the globe.IMR 4227 Powder in inventory now will be the Magnum Pistol Powder in the IMR … Read More