Creation of IMR powders dates back over 200 decades when the corporate was at first founded 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 in inventory now will be the Magnum Pistol Powder in the IMR lineup. If it says imr 4227 Magnum, 4227 powder would be the option for true magnum velocities and functionality. In rifles this imr 4227 powder provides excellent velocity and accuracy in this sort of cartridges since the 22 Hornet and 221 Fireball.