The Sierra Tipped GameKing (TGK), also marketed under the “GameChanger” name, is a high-performance hunting bullet designed to combine the legendary accuracy of Sierra’s MatchKing line with the terminal performance required for hunting. These projectiles are designed for rapid expansion upon impact, featuring a transparent green tip for improved ballistic coefficients (BC) and a boat tail design for stable flight.
Product Features and Specifications
- Design: Re-engineered from the MatchKing, these feature a hollow point design, a green polymer tip, and a tough copper jacket with a special lead alloy core for balanced penetration and expansion.
- Accuracy: Engineered for high ballistic coefficients (BC) and designed to deliver sub-MOA accuracy in many platforms.
- Performance: Optimized for quick expansion on impact, making them ideal for medium and big game hunting.
- Availability: These are component bullets for handloading, not usually factory-loaded ammunition.
Key Models and Offerings (TGK)
- 6mm (.243 dia): 90gr, 100gr (often used for whitetail/varmint).
- 25 Cal (.257 dia): 110gr (new), 131gr.
- 6.5mm (.264 dia): 120gr (6.5 Grendel), 130gr, 140gr, 145gr (6.5 PRC).
- .270 Cal (.277 dia): 140gr, 175gr (heavy-duty hunting).
- 7mm (.284 dia): 140gr (7mm-08), 150gr, 165gr (popular for 7mm Rem Mag).
- 30 Cal (.308 dia): 125gr (300 Blackout), 165gr, 180gr (optimized for .308/30-06), 195gr, 210gr.
Ballistic Data Examples
- 6.5mm 145gr: G1 BC of 0.597, requires 1:8″ twist or faster.
- 7mm 165gr: High ballistic coefficient, optimized for long-range, requires 1:8″ twist or faster.
- 30 Cal 165gr: G1 BC of 0.530, G7 BC of 0.234.
- 6mm 100gr: G1 BC of 0.515, G7 BC of 0.253.
Usage Recommendations
- Minimum Velocity: Recommended minimum velocity for reliable expansion on ribs is 1,800 feet per second.
- Game Suitability: Suitable for deer, hogs, and up to big bull elk, depending on grain weight.
- Twist Rates: Generally require faster twist rates (e.g., 1×8″ or 1×9″ for many calibers) due to their long, sleek profile.




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