Winchester Super-X Rimfire cartridges are the most technologically advanced ammunition. By combining advanced development techniques and innovative production processes they have elevated ammunition performance to its highest level. – Caliber: 22 Short – Bullet Weight: 29 gr – Bullet Type: Lead Round Nose Low Noise Copper Plated – Muzzle Energy: 77 ft / lbs – Muzzle Velocity: 1095 fps – Rounds Per Box: 50 – Rounds per Case: 5000