The 17 WSM round was designed to be a blisteringly fast moving rimfire round that is a great varmint hunting round. You're sure to love the 3000 fps and the deadly expansion you get with this round when out in the field. The polymer tip on this round aids in giving you great ballistics, high accuracy, and beautiful mushrooming on impact.Specifications:Bullet Weight 20 GrainBullet Type Polymer TippedAmmo Casing BrassQuantity 50Ammo Caliber .17 Win Super Mag (WSM)Primer Type RimfireMuzzle Velocity (fps) 3000Attracts Magnet No