Sierra 6.5mm/.264 Caliber 140 Grain Tipped GameKing Bullets - 100 Count Box

The Sierra 6.5mm 140 Grain Tipped GameKing bullet is purpose-built for modern rifle cartridges that can stabilize it—specifically those with a 1-in-8 or faster twist rate. If you're loading ammunition for 6.5 Creedmoor, 6.5 PRC, or similar mid-sized magnum rounds, this bullet bridges the gap between velocity, accuracy, and field performance on game ranging from whitetail and black bear to elk-sized animals. The polymer tip initiates reliable expansion while the thick jacket controls penetration, giving you consistent, ethical kills across a variety of hunting scenarios.

What makes this bullet worth the bench time is the engineering underneath: sectional density of 0.287 keeps energy transfer efficient through heavy bone and muscle, and the ballistic coefficients adapt to real-world velocity drops downrange. At typical hunting speeds (2115 fps and above), you get a BC of .563; dial back to mid-range speeds, and the bullet still performs with a BC of .531. Below 1640 fps, expect a BC of .466. That versatility means you can load for different hunting distances without completely changing your ballistic profile.

Sierra has been making hunting bullets for decades, and this 140-grain Tipped GameKing reflects lessons learned from field use and terminal performance data. Each box contains 100 projectiles, ready to load into your favorite brass and powder combination. If your twist rate is 1-in-8 or faster, this is a legitimate choice for anyone building precision hunting loads in 6.5mm.

Key Features

• Polymer tip accelerates expansion and improves ballistic coefficient
• Thick jacket regulates penetration for controlled energy release
• Designed for modern 6.5mm cartridges with 1-in-8 or faster twist
• Suitable for game from whitetail to elk
• 100 bullets per box for efficient batch loading

Specifications

Frequently Asked Questions

What twist rate do I need for the Sierra 140 Grain Tipped GameKing?

Your rifle barrel must have a twist rate of 1 in 8 or faster to stabilize this bullet properly. If your barrel is slower (1 in 9 or 1 in 10), this bullet is not recommended.

What game can I hunt with this bullet?

Sierra designed this bullet for whitetail deer, black bear, and larger game like elk. The thick jacket and polymer tip are engineered to deliver reliable expansion and penetration across that range, though always consider your specific cartridge's velocity and your shooting distance when selecting ammunition for any hunt.

What cartridges work with this bullet?

The 6.5mm 140-grain Tipped GameKing is intended for modern 6.5mm cartridges. The supplier notes it is designed for newer cartridges with 1-in-8 twist rates—such as 6.5 Creedmoor and 6.5 PRC—but load compatibility always depends on your specific rifle and reloading manual. Consult published reloading data for your cartridge before development.

How many bullets are in a box?

Each box contains 100 Sierra 140 Grain Tipped GameKing bullets, giving you a standard quantity for batch loading and testing.