Starline Brass Star4440EUP1: Also known as the .44-40 Winchester, .44 WCF, and .44 Winchester, this caliber gained popularity because of its availability in both rifles and handguns. The advent of Cowboy Action Shooting has helped to revive this obsolete vintage cartridge. Our .44-40 brass has a wall thickness of .0065\" but is still stiffer and less fragile than other brands, which makes it much easier to reload.