Winchester #41 5.56 Military Primers




Winchester Small Rifle 5.56mm NATO-Spec Military Primers #41 Box of


In fact, Winchester NATO-Spec Military Primers (Winchester WSR Primers) are the same primers that are used in Lake City 5.56mm ammo, and they are manufactured by Winchester as part of the Lake City 5.56mm ammo line. For consistency in performance from shot to shot, Winchester WSR Primers are manufactured to exacting standards to ensure that they perform consistently.
Winchester Small Rifle 5.56mm NATO-Spec Military Primers #41 Box of

Every primer undergoes regular and extensive testing at temperatures and under conditions that are significantly higher than those encountered in everyday use in order to ensure consistency and sensitivity in the final product. Specifically for the Winchester WSR Primers, Winchester ensures uniformity of both size and quality, exact measurements and tolerances for anvil heights, as well as stability under varying temperatures and relative humidity.

Winchester #41 5.56 Military Primers

Winchester WSR Primers are #41 Small Rifle Primers, which are similar to the CCI No. 41 primers and are utilized by the military and original equipment manufacturers of small guns. No matter what the weather conditions are, these non-corrosive all-weather primers provide rapid and consistent ignition in every situation.

Winchester #41 Small Rifle Primers (Case of 5000) - LIMITED SUPPLY - East Coast Reloading Supplies, Inc.

Continually and meticulously testing primers in temperature and environmental conditions that are far beyond those encountered in typical use is necessary to ensure consistency and sensitivity. Winchester guarantees increased sensitivity for more positive firing in all guns, as well as carefully regulated weights of primer mixes, consistency in size and quality, exact measurements with tight tolerances for anvil heights, and stability in extremes of temperature and humidity.

Winchester No. 41 primer ( Winchester WSR Primers ) is more sensitive, easier to seat, and more compatible with progressive and automated loading equipment than even before. Winchester primers have always incorporated modern non-corrosive and non-mercuric initiator mixes.

Winchester #41 5.56 Military Primers

Winchester Small Rifle 5.56mm NATO-Spec Military Primers #41 Box of


Firing pin retraction springs are uncommonly found in military-style semi-automatic rifles. If proper care is not taken when assembling ammunition, a “slam-fire” can occur before the bolt is fully locked in the chamber. The military arsenals accomplish this through the use of techniques and components that differ from their commercial counterparts, including primer sensitivity specifications that differ from their commercial counterparts.

Winchester makes rifle primers ( Winchester WSR Primers ) for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control*. If you’re reloading for a military semi-auto, look to Winchester Military primers

Winchester #41 5.56 Military Primers

Quantity Information:

  • Box of 1000: 10 Sleeves of 100
  • Box of 5000: 5 boxes of 1000


  • Non-corrosive and non-mercuric
  • These primers contain no ingredients that cause barrel rusting
  • Legendary Reliability, Consistency, and Precision

Product Information

1000 Piece
Small Rifle
United States of America


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