Built on a legacy of precision ignition, this brick of 1,000 Winchester Large Pistol Primers delivers the consistent, reliable performance required for serious reloading. Each nickel-plated primer is engineered with a proprietary priming compound and uniform brass cup to ensure dependable ignition across a wide spectrum of pistol cartridges—from .45 ACP and .44 Magnum to 10mm Auto and .357 Magnum.