Product Overview: IMR 4227 PowderCreation of IMR powders dates back above two hundred decades when the corporate was at first Started by E.I DuPont. Available for use in several reloading apps, 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 during the IMR lineā¦ Read More