Winchester introduces the new Supreme Elite XP3 bullet, which combines all of its best-known bullet technologies into one bullet for precision accuracy, knockdown power and deep penetration. The XP3 starts with a design that separates the front of the bullet from the rear lead core. A web of copper- jacket material mechanically locks the bullet together, then a bonded (soldered) rear lead core locks the lead to the jacket. The bonding allows the lead to stay with the jacket during impact, resulting in nearly 100 percent weight retention. In addition, the patent-pending design yields a unique two-stage expansion at the front and in the body of the bullet, resulting in massive knockdown power. It can penetrate tough bone but still yields significant expansion in lighter, thin-skinned game, like deer.