Creation of IMR powders dates back over 200 decades when the corporate was at first Started by E.I DuPont. Accessible for use in several reloading applications, the IMR series of powder is reliable by reloaders all around the world.IMR 4227 Powder imr 4227 load data in inventory now may be the Magnum Pistol Powder from the IMR imr 4227 load data li