Solution Overview: IMR 4227 PowderManufacture of IMR powders dates back in excess of 200 several years when the organization was at first Launched by E.I DuPont. Readily available for use in several reloading programs, the IMR series of powder is reliable by reloaders all across the globe.IMR 4227 Powder in stock now will be the Magnum Pistol Powde