Winchester Small Rifle Primers 41

Winchester NATO-Spec Army Primers 41 are the same primers used in the Lake City 5.56mm ammunition. These primers are created to exacting requirements for shot to shot regularity. All primers are constantly winchester 41 primers and rigorously tested for regularity and sensitivity at temperatures and conditions considerably further than the selection of typical usage. Winchester guarantees carefully-managed weights of primer mixtures, consistency in dimension and good quality, exact measurements and tolerances for anvil heights and stability in extremes of temperatures and humidity.