IMR 4064 Smokeless Powderimr 4064 is considered the most adaptable propellant from the IMR line, employed for 223 Remington, 22-250 Remington, 220 Swift, 6mm Remington, 243 Winchester Super Brief Magnum, 308 Winchester, 338 Winchester Magnum, and also the record goes on and on. Versatility with uniformity and accuracy.This smokeless powder is usua