IMR powders have been manufactured for nearly 200 years, since the company was founded by E.I. DuPont. The IMR powder line is trusted by reloaders all over the world for use in a variety of reloading applications. IMR 3031 is a versatile propellant that has long been favored by 308 Match shooters who employ 168-grain match bullets. It's a superb 30-30 Winchester powder and works equally well in small-capacity varmint cartridges from 223 Remington to 22-250 Remington.