IMR 4064 Smokeless Powder imr 4064 is easily the most functional propellant during the IMR line, employed for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Small Magnum, 308 Winchester, 338 Winchester Magnum, along with the record goes on and on. Versatility with uniformity and accuracy. https://zbigniewq568xxb3.eqnextwiki.com/user