Norma Unprimed Brass Cases 378 Weatherby Magnum (20pk)Norma Unprimed Brass is world renowned as being the absolute highest quality brass available. These cases start off with the best possible raw materials with the narrowest tolerances. The case necks are annealed to soften the brass and prevent gas leaks the case body is at the optimum hardness to avoid any unnecessary stretching. New, unprimed brass that features chamfered and deburred case mouths and a punched flash hole (magnum calibers are