Winchester Modest Rifle Primers forty one

Winchester NATO-Spec Navy Primers 41 are the identical primers used in the Lake Metropolis five.56mm ammunition. These primers are built to exacting specifications for shot to shot consistency. All primers are continuously and rigorously tested for consistency and sensitivity at temperatures and situations far outside of the range of normal winchester 41 primers use. Winchester assures carefully-managed weights of primer mixtures, regularity in sizing and top quality, exact measurements and tolerances for anvil heights and security in extremes of temperatures and humidity.