Load up on the CCI Mini-Mag .22 LR 40-Grain High Velocity Rifle Ammunition - 100 Rounds. It has a 40-grain weight. The box contains 100-rounds, and has a .22 LR caliber. CCI Mini-Mag .22 LR 40-Grain High Velocity Rifle Ammunition - 100 Rounds - Rimfire Shells at Academy Sports