IMR 4227 Powder Available In Stock This is “the” magnum pistol powder in the IMR lineup. If it says magnum, IMR 4227 Powder in stock now for sale is the choice for true magnum velocities and performance. In rifle, this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball. Grain shape is extruded (stick). Container sizes range from 1 pound to 8 pounds. This Smokeless Powder is a magnum pistol propellant with a medium burn speed and a medium burn time. For actual magnum velocities and performance in a handgun that specifies Magnum, this Powder is the weapon of choice. In rifles, this powder produces outstanding velocity and accuracy in cartridges like as the 22 Hornet and the 221 Fireball, which are popular choices.
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