IMR 4064 Powder In Stock The IMR Smokeless 4064 Gun Powder 1 LB is the most versatile propellant in the IMR spectrum. 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Short Magnum, 308 Winchester, 338 Winchester Magnum and the list goes on and on. Versatility with uniformity and accuracy. Grain shape is extruded (stick)
