IMR 4064 Smokeless Powderimr 4064 is considered the most flexible propellant inside the IMR line, utilized for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Shorter Magnum, 308 Winchester, 338 Winchester Magnum, as well as record goes on and on. Flexibility with uniformity and accuracy.This smokeless powder is rea