IMR 4064 Smokeless Powder imr 4064 is among the most flexible propellant inside the IMR line, utilized for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Tremendous Limited Magnum, 308 Winchester, 338 Winchester Magnum, as well as listing goes on and on. Flexibility with uniformity and accuracy. https://chaplint346rtt0.wikipowell.com/user