Product Overview: IMR 4227 Powder
Production of IMR powders dates back over 200 years when the company was originally founded by E.I DuPont. Available for use in many reloading applications, the IMR series of powder is trusted by reloaders all across the globe.
IMR 4227 Powder in stock now is the Magnum Pistol Powder in the IMR lineup. If it says Magnum, 4227 powder is the choice for true magnum velocities and performance. In rifles this powder delivers excellent velocity and accuracy in such cartridges 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.
4227 Powder Specifications
Miningdeacon From Georgia –
I am loading for a 1927 Winchester Model 53 chambered in 25-20 WCF. It is extremely difficult to find factory ammo for this caliber (and VERY expensive). I have been testing several loads. So far 7.8 grains of IMR 4227 behind 85 grain hard cast bullets have shot the best groups.