The Federal Premium loads start with the finest primers which are subjected to more frequent inspections for dimensional tolerances and charge weight to ensure they deliver consistent ignition for every shot. Next is the propellants which are specially formulated to meet Federal’s stringent specifications. These clean-burning powders are of the highest grades in the industry. They’re consistent and reliable. Lastly the casing. The precision-built cases in most centerfire Premium loads feature nickel-plated brass that defeats corrosion and aids in sleek smooth extraction in even the most extreme conditions.Extract maximum performance from your favorite cartridge with Trophy Copper the official rifle ammunition of MeatEater’s Steven Rinella. The loads provide pinpoint accuracy and aggressive expansion yet the copper polymer-tipped bullet retains up to 99 percent of its weight for deep penetration on a wide range of medium and big game. Specifications: 308 Win/165 gr/Trophy Copper (TC)/20rd Box