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This is the ammunition Wilson Combat built to do multiple jobs well. The 65-grain Sierra GameKing SBT pairs a proven hunting bullet with consistent brass-cased loading, giving you a round that handles predators, whitetail deer, and even defensive applications without compromise.
The Sierra GameKing has been a top choice since 2004 for good reason. It's built with a tougher lead core and thick jacket that holds together even at higher velocities, yet still expands reliably on game. That combination makes it different from both ultra-fragile varmint rounds and hardened match bullets. Real-world experience shows this bullet delivers consistent results from 50 yards out to 300+ yards depending on shot placement and your rifle's twist rate.
The 2730 fps muzzle velocity delivers 1076 foot-pounds of energy, which is the practical sweet spot for this caliber and bullet weight. The load shoots well in 1-7, 1-8, and 1-9 twist barrels, so whether you're running a modern AR or a bolt rifle, this round should stabilize cleanly. That broad twist compatibility means you don't need to second-guess your barrel specs.
You get brass cases (not steel), consistent powder charges, and ammunition built by a company that's been refining firearms and ammunition since 1977. Twenty rounds per box keeps costs reasonable while giving you enough to work up loads, run a range session, or have on hand when it matters.
Yes. Wilson Combat rates this load for 1-7, 1-8, and 1-9 twist barrels, so standard AR-15s and modern bolt guns should stabilize the bullet cleanly. If you have a slower twist (1-12 or slower), the 65-grain bullet may not stabilize properly, so verify your barrel specs first.
The 65-grain weight is the middle ground. It's heavier than typical 55-grain varmint rounds, giving better energy retention and penetration for medium game and predators. It's lighter than 77-grain match loads, so it won't match their long-range precision, but it's built to expand where a match bullet won't. Real-world testing shows this bullet performs well from point-blank to 300 yards.
.223 Remington ammunition can safely be fired in rifles chambered for 5.56 NATO. However, the reverse is not always true. Always verify your firearm's chamber specification before mixing cartridge types.
The 0.187 sectional density and 0.256 G1 ballistic coefficient reflect how the bullet cuts through air and retains energy downrange. These numbers indicate the GameKing is moderately efficient in flight, meaning it maintains velocity reasonably well to mid-range distances while still being built for expansion rather than match-grade precision.
| Caliber/Gauge | .223 REM/5.56 NATO |
|---|---|
| Case Material | Brass |
| Cost per Round | 1.70 |
| Grains | 65 GR |
| Manufacturer | |
| Manufacturer Part Number | A22365SBT |
| Shipping Weight | 0.554 |
| Units per Box | 20 |
| UPC | 874218007294 |
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