Winchester AccuBond CT Centerfire Rifle Ammunition has a bonded alloy lead core that allows for increased penetration. The controlled expansion helps to take down game. This particular bullet also features a polymer tip jacket technology and a Lubalox coating of black oxide the last of which helps to reduce fouling.The AccuBond CT ammo has a polycarbonate tip and the heavy tapered jacket is directly bonded with the lead alloy core. The design creates maximum expansion no matter the range. There are several calibers and bullet styles for this particular ammunition and it comes in boxes with 20 rounds.