Optimal jacket wall thickness controls expansion and retains weight. Open pocket under the polymer tip expands lead core instantly on impact. Tuned ogive for industry-leading BC. Boat tail design for stable flight and accuracy. Introducing the Sierra GameChanger hunting bullet: the perfect combination of Sierra's legendary match accuracy coupled with deadly penetration. Sierra re-engineered their legendary MatchKing bullet into a hollow point design for quick expansion and fitted it with a transparent green tip for ballistic uniformity. Inside, the GameChanger features a unique construction that utilizes a special lead alloy surrounded by a tough copper jacket that delivers excellent penetration and expansion at a variety of ranges. It's a GameChanger on any hunt! This is not loaded ammunition. This bullet requires a barrel twist rate of 1x8" or faster. (4330).