Optimal jacket wall thickness controls expansion and retains weightOpen pocket under the polymer tip expands lead core instantly on impactTuned ogive for industry-leading BCBoat 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 1?8? or faster.