Production of IMR powders dates back about 200 yrs when the company was originally Established 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 is the Magnum Pistol Powder while in the IMR lineup. If it suggests Magnum, 4227 powder will be imr 4227 the choice for real magnum velocities and performance. In rifles this powder delivers outstanding velocity and imr 4227 accuracy in these cartridges as the 22 Hornet and 221 Fireball.