Products Overview: IMR 4227 PowderManufacture of IMR powders dates back again above 200 years when the organization was at first Launched by E.I DuPont. Accessible for use in many reloading purposes, the IMR series of powder is dependable by reloaders all across the globe.IMR 4227 Powder in inventory now could be the Magnum Pistol Powder from the I