Manufacture of IMR powders dates back over 200 yrs when the company was initially Established by E.I DuPont. Readily available 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 would imr 4227 load data be the Magnum Pistol Powder within the IMR lineup. If it claims imr 4227 load data Magnum, 4227 powder is the choice for real magnum velocities and performance. In rifles this powder delivers outstanding velocity and precision in these types of cartridges as the 22 Hornet and 221 Fireball.