Federal Premium MeatEater 223 Remington 55gr Trophy Copper Rifle Ammo - 20 Rounds - Get pinpoint accuracy, superior penetration and aggressive expansion in a copper, polymer-tipped bullet with the Trophy Copper. The projectile provides flat trajectories and tremendous downrange performance on everything from antelope to moose. Copper-alloy Construction Provides Up To 99 Percent Weight Retention For The Deepest Penetration In An Expanding Bullet Tipped Bullet Cavity Is Optimized For Expansion Across A Broad Velocity Range Grooved Bullet Shank For Superb Accuracy Across A Wide Range Of Firearms Polymer Tip And Boat-tail Design Increase The Ballistic Coefficient For High Downrange Velocity And Energy, With Minimal Bullet Drop