http://nielsenspecialtyammo.com/pages/swaged-pellets-for-air-rifles

Swaged pellets are nicely formed and also precise ammo for high powered PCP air rifles as well as pellet guns. These pellets, typically described as bullets or slugs, are developed in a swaging machine. Utilizing cool lead, a core is positioned right into the die and pressed from top and also the bottom to form it into a pellet.