IMR powder production dates back more than 200 years, when E.I. DuPont founded the company. The IMR series of powder is trusted by reloaders all over the world and is suitable for a wide range of reloading applications.
The Magnum Pistol Powder in the IMR lineup is IMR 4227. IMR 4227 is the choice for true magnum velocities and performance if it says Magnum. This powder produces excellent velocity and accuracy in rifle cartridges such as the 22 Hornet and 221 Fireball.
- Do not exceed the loads displayed in the reloaders guide.
- Never mix any two powders regardless of type, brand, or source.
- Never substitute any smokeless powder for Black Powder or any Black Powder substitute.