Creation of IMR powders dates back again about 200 a long time when the business was originally Established by E.I DuPont. Accessible for use in many reloading apps, the IMR series of powder is reliable by reloaders all across the globe.IMR 4227 Powder in inventory now imr 4227 load data may be the Magnum Pistol Powder in the IMR lineup. If it clai