The CCI 250 Large Rifle Magnum Primers is a pack of 1000 percussion caps used to reload magnum large rifle loads. Magnum primers are intended for large-capacity cases, very low temperatures and/or ball propellants. CCI primers utilise non-corrosive and non-mercuric initiator mixes selected for their clean burning characteristics. All CCI Primers have a larger anvil area to compensate for firearms that may have an off-centre firing pin and are engineered to enable smooth feeding in automated reloading equipment.