Gamo Red Fire Hunting Pellet,.177-Cal., 150-Ct.Gamo , 150 count, . 177 caliber red fire hunting pellet, penetration & velocity, exceptional accuracy, lethal penetration, uniformed expansion , high velocity performance & hydraulic expansion at point of impact, diamond shaped hard polymer tip provides true ballistic trajectory, the force of impact drives the diamond polymer tip into the cylinder jacket material forcing it to expand outwards increasing the diameter of the projectile as it passes