Item Overview: IMR 4227 PowderProduction of IMR powders dates again in excess of two hundred yrs when the corporate was originally Launched by E.I DuPont. Accessible for use in many reloading apps, the IMR number of powder is trustworthy by reloaders all around the world.IMR 4227 Powder in stock now could be the Magnum Pistol Powder within the IMR