Winchester NATO-Spec Navy Primers 41 are exactly the same primers Employed in the Lake Town five.56mm ammunition. These primers are crafted to exacting requirements for shot to shot consistency. All primers are regularly and rigorously examined for regularity and sensitivity at temperatures and disorders significantly over and above the number of standard utilization. Winchester guarantees carefully-managed weights of primer mixtures, consistency in winchester 41 primers measurement and excellent, exact measurements and tolerances for anvil heights and balance in extremes of temperatures and humidity.