Merchandise Overview: IMR 4227 PowderCreation of IMR powders dates back again in excess of 200 many years when the organization was at first Launched by E.I DuPont. Readily available for use in several reloading programs, the IMR number of powder is trustworthy by reloaders all around the world.IMR 4227 Powder in stock now is the Magnum Pistol Powd