Manufacture of IMR powders dates again about 200 yrs when the organization 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 may be the Magnum Pistol Powder during the IMR lineup. If it says Magnum, 4227 powder imr 4227 would be the option for true magnum velocities and effectiveness. In rifles this powder provides superb velocity and precision imr 4227 load data in such cartridges because the 22 Hornet and 221 Fireball.