Introduction
Discover the Sierra GameKing, a soft-point bullet designed for hunters who demand precision and versatility. Introduced by Sierra Bullets in 1978, based in Sedalia, Missouri, the GameKing offers boat-tail construction for enhanced ballistics in a wide range of hunting applications.
Renowned for its accuracy and controlled expansion, the GameKing delivers effective terminal performance, making it a top choice for ethical hunters pursuing medium to large game. Its versatile design ensures consistent results across varied hunting scenarios, from dense woods to open fields.
- Caliber Range: Available from .224 to .375 inches, supporting cartridges like .223 Remington, .243 Winchester, 6.5 Creedmoor, .270 Winchester, .308 Winchester, and .300 Winchester Magnum.
- Weight Options: Spans 55 to 250 grains, with popular variants like 55-grain .224, 100-grain .243, and 165-grain .308.
- Hunting Focus: Optimized for accurate placement and reliable expansion, ideal for medium to large game at mid to long ranges.
Technical Characteristics
The Sierra GameKing is crafted for hunters seeking precision and reliability. Its lead-core design and advanced features make it a standout in the field.
- Lead Core with Copper Jacket: Features a lead core encased in a copper jacket for high weight retention and controlled expansion, preventing excessive fragmentation.
- Soft-Point Design: Exposed lead tip ensures reliable expansion at velocities as low as 1,800 fps, achieving 1.5-2x diameter expansion.
- Boat-Tail Profile: Streamlined boat-tail design enhances ballistic efficiency and reduces drag for flat trajectories.
- Velocity and Range: Optimized for muzzle velocities of 2,000-3,500 fps, effective to 500+ yards with excellent stability.
- Cannelure: Includes a cannelure for secure crimping and reliable feeding in various rifles.
Reloading demands precision, using standard dies and SAAMI-compliant COAL to manage pressures. Maintain case neck tension (0.002-0.004″) for optimal accuracy, as the GameKing’s design excels in varied hunts but requires careful load development.
Ballistics and Performance
With G1 BCs ranging from 0.185 to 0.517, the GameKing provides strong long-range stability and wind resistance, supported by high sectional density for reliable penetration. Field tests show a 100-grain .243 GameKing achieving 0.5-1.0 MOA at 300 yards with ES/SD under 15 fps from a 1:10 twist barrel. The 55-grain .224 is ideal for varmints and small game, while the 165-grain .308 excels for deer or elk, maintaining energy to 400 yards.
The Expert Ballistics Table below lists key GameKing variants from Sierra specifications, sorted by diameter then weight. BCs are G1; verify on Sierra’s site for updates.
| Diameter (inches) | Weight (grains) | Ballistic Coefficient (BC) | Sectional Density |
|---|---|---|---|
| 0.224 | 55 | 0.250 | 0.157 |
| 0.224 | 65 | 0.303 | 0.185 |
| 0.243 | 85 | 0.315 | 0.206 |
| 0.243 | 100 | 0.361 | 0.242 |
| 0.264 | 120 | 0.400 | 0.246 |
| 0.264 | 140 | 0.465 | 0.287 |
| 0.277 | 130 | 0.373 | 0.242 |
| 0.284 | 140 | 0.390 | 0.248 |
| 0.308 | 150 | 0.343 | 0.226 |
| 0.308 | 165 | 0.363 | 0.248 |
| 0.308 | 180 | 0.435 | 0.271 |
| 0.338 | 215 | 0.517 | 0.269 |
Groups of 0.5-1.0 MOA achievable; excels to 500 yards with proper shot placement.
Comparison Bullets
The GameKing competes with Sierra Pro-Hunter (flat-base soft-point), Remington Core-Lokt (soft-point lead-core), and Federal Power-Shok (soft-point lead-core). Its BCs (0.185-0.517) surpass Pro-Hunter (0.185-0.310) and Core-Lokt (0.200-0.300) due to boat-tail design, offering 10-15% better trajectory at 300 yards. The GameKing’s expansion matches Core-Lokt at high velocities (3,000 fps) but provides 5-10% deeper penetration than Power-Shok. Against Pro-Hunter 150gr .308, the GameKing 150gr .308 drops 10% less at 300 yards; versus Core-Lokt 180gr .308, it retains similar weight with less fragmentation. Advantages: superior long-range accuracy, versatility. Drawbacks: slightly higher cost ($0.30-$0.50 per bullet), more sensitive to velocity for expansion.
| Bullet | Diameter Range (inches) | Weight Range (grains) | BC Range | Key Feature |
|---|---|---|---|---|
| Sierra GameKing | 0.224-0.375 | 55-250 | 0.185-0.517 | Boat-tail soft-point |
| Sierra Pro-Hunter | 0.224-0.458 | 55-400 | 0.185-0.310 | Flat base, soft-point |
| Remington Core-Lokt | 0.224-0.375 | 55-250 | 0.200-0.300 | Locked-core soft-point |
| Federal Power-Shok | 0.224-0.458 | 55-300 | 0.190-0.290 | Affordable soft-point |
Field reports show GameKing outperforming Pro-Hunter by 0.3 MOA at 300 yards and matching Core-Lokt in terminal consistency.
Applications and Practical Aspects
Ideal for hunting:
- 55-65gr .224 for varmints and small game;
- 85-100gr .243 for deer and antelope;
- 120-140gr 6.5mm for mid-range elk or bear;
- 150-180gr .308 for moose or large game;
- 215gr .338 for long-range big game.
Delivers 0.5-1.0 MOA in tuned rifles, ideal for ethical kills.
Reloading
- Load Data: Refer to Sierra’s reloading manual or website for GameKing-specific data, as the lead-core design generates standard pressures similar to other jacketed bullets.
- Starting Charges: Begin at recommended loads for comparable lead bullets to avoid over-pressure; increase gradually while checking for pressure signs.
- Seating Consistency: Ensure precise seating depths (0.010-0.050″ off lands) to maximize accuracy, as the GameKing’s profile is sensitive to inconsistencies.
- Crimp Application: Apply a light to medium crimp on the cannelure for secure bullet retention, particularly in semi-auto or high-recoil rifles, ensuring reliable feeding.
- Barrel Twist Compatibility: Match barrel twist rate to GameKing weight (e.g., 1:12 for 55gr .224, 1:10 for 100gr .243) for proper stabilization and optimal accuracy.
- Velocity Check: Chronograph to confirm velocities above 1,800-2,000 fps for reliable expansion, targeting extreme spreads under 15 fps.
- Storage: Store in sealed containers to protect from moisture; suitable for all hunting applications per design.
Conclusion
Sierra GameKing is a precision soft-point hunting bullet, offering high ballistic coefficients and reliable expansion for versatile game. Its accuracy and performance make it a strong choice for hunters seeking long-range capability. Visit official website.
