IMR 4064 Smokeless Powder imr 4064 is easily the most functional propellant from the IMR line, utilized for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Tremendous Small Magnum, 308 Winchester, 338 Winchester Magnum, along with the list goes on and on. Versatility with uniformity and precision. https://hannesy467tuu0.empirewiki.com/user