IMR 4064 Smokeless Gun PowderIMR 4064 is a medium-range burn speed powder and is one of the most versatile propellant in the IMR line, used for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Short Magnum, imr 4064 powder for sale 308 Winchester, 338 Winchester Magnum, and the list goes on 4064 imr powder and on. Ver