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 utlilizes 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. - Dia. (inches): 0.308 - Weight (grains): 165 - Sectional Density: .248 - Ballistic Coefficients and Velocity Ranges: .530 @ 2680 fps and above .440 between 1300 and 2680 fps .320 @ 1300 fps and below