WINCHESTER 6mm Remington Unprimed Rifle Cases (WSC6MMRU)

As the toughest and most formable in the industry, these cartridge cases are carefully drawn from specially alloyed brass to provide consistently exact internal volume and resistance to case stretching and brittleness. Primer pocket tolerances are held to .001". Finally, closely monitored case neck annealing assures easier resizing and longer reloading life.