Winchester Small Rifle 5.56mm NATO-Spec Military Primers #41 Box of 1000 (10 Trays of 100)

To ensure consistency and sensitivity, all primers are constantly and rigorously tested at temperatures and under conditions that are far beyond those encountered in normal use.

When it comes to primer mixture weights, Winchester ensures consistency in size and quality, precise measurements and tolerances for anvil heights, and stability in the face of extremes in temperature and relative humidity. Non-corrosive, all weather primers deliver fast, dependable ignition under any shooting condition. Winchester works to make sure all primers are reliable, instant and precise. In Winchester testing labs, primers are constantly and rigorously tested for consistency and sensitivity at temperatures and conditions far beyond the range of normal usage. Winchester guarantees better sensitivity for more positive firing in all guns, carefully-controlled weights of primer mixtures, consistency in size and quality, precise measurements and tolerances for anvil heights, and stability in extremes of temperatures and humidity.