Sako Super Hammerhead AmmunitionA heavy jacketed, strong and non fragmenting bullet that ensures controlled expansion. A bonded core provides high weight retention, which results in effective penetration. It is boat tailed for high ballistic efficiency, which causes a flatter trajectory. It was developed and tested by Sako ballistic laboratories first, followed by actual extensive big game hunting tests. The bullet is designed for big game hunting at short to medium distances.