Merchandise Overview: IMR 4227 PowderManufacture of IMR powders dates back more than two hundred yrs when the corporate was initially founded by E.I DuPont. Obtainable for use in lots of 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 ins