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. The Trophy Copper uses a unique two-part sabot design to produce rifle-like accuracy at 200 yards through rifled barrels. The slug's deep, externally skived nose cavity provides superior expansion, while the polymer tip and sleek profile increase downrange velocity and game-dropping energy.