Creation of IMR powders dates back over 200 years when the corporate was originally Launched by E.I DuPont. Readily available for use in lots of reloading purposes, the IMR series of powder is trustworthy by reloaders all around the world.IMR 4227 Powder in inventory now imr 4227 will be the Magnum Pistol Powder from the IMR lineup. If it states Ma