Alco Precision Air gun swagged lead bullets are engineered for .510 rifles in 350 grain. These High Performance Air Gun lead ammo projectiles are hand swagged for extreme accuracy in the field. Used in target and hunting applications, they feature great ballistics due to the well designed Hollow Point with a flat base. Extensively tested, they will go down range efficiently with minutes of accuracy (MOA) results that are above the competition. Air-gunners will love how they group. Get yours today.