IMR 4227

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Propellant / Powder:	IMR 4227
Relative Burn Rate:	4.2 (0 ... slow\| 10 ... fast)
Weapon Use:	Rifles
Density:	94.89lbs/ft3 \| 1520kg/m3
Bulk Density:	52.56lbs/ft3 \| 842kg/m3
PID:	PID_124
Last updated:	12/17/2024

Technical Specifications:

IMR 4227 is a medium burn speed, magnum pistol propellant. If a pistol says Magnum, IMR 4227 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.