IMR 4064 Smokeless Powder imr 4064 is easily the most flexible propellant within the IMR line, useful for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Shorter Magnum, 308 Winchester, 338 Winchester Magnum, along with the list goes on and on. Versatility with uniformity and precision. https://johnnya578vwu0.dm-blog.com/profile