Lot contains one box of Winchester Large Pistol Primers for standard or magnum pistol loads, No. WLP, quantity approx 1000. Winchester Large Pistol Primers are the perfect solution for all your large pistol reloading needs. The Winchester Large Pistol Primers are non-corrosive and weather proof so you can be sure your primers will ignite no matter the conditions. Winchester Large Pistol Primers are tested constantly to ensure that they adhere to the same size and sensitivity which will lead to top performance lot to lot. Winchester Large Pistol Primers are checked for anvil height and stability in extreme temperatures so that no matter the weather conditions, your primers will ignite.