Federal Gold Medal 338 Lapua Magnum 300gr Sierra BTHP Rifle Ammo - 20 Rounds - Gold medal centerfire rifle and handgun cartridges are known for accuracy. The aerodynamic design of the Sierra matchking bullet helps overcome wind resistance, resulting in flatter trajectory, consistent accuracy and higher retained energy. The handgun calibers come with full metal jackets or full metal jacket semi-wadcutters.