IMR 4064 Smokeless Powderimr 4064 is among the most adaptable propellant within the IMR line, employed for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Tremendous Quick Magnum, 308 Winchester, 338 Winchester Magnum, as well as listing goes on and on. Versatility with uniformity and precision.This smokeless powder is us