PROOF Research BBL Carbon Fiber Blank Bolt .264 Caliber Sendero 20" 1:7.5 Twist Barrel

The PROOF Research BBL Carbon Fiber Blank Bolt barrel in .264 caliber delivers the weight savings and thermal stability serious long-range shooters demand. Built as a 20" Sendero profile barrel with a 1:7.5 twist rate, this is a purpose-built blank for gunsmiths and shooters ready to assemble or re-barrel a precision rifle. Carbon fiber construction keeps the overall system light without sacrificing rigidity, making it an excellent choice for hunters and match shooters who log miles between shooting positions or spend long days glassing from camp.

The .264 caliber has earned its reputation for flat trajectories and extended-range performance. The 1:7.5 twist is engineered to stabilize the heavier projectiles that make the .264 shine, giving you room to experiment with modern hunting and match-grade ammunition. At just 2 lbs 13 oz, this barrel won't bog down your build—critical whether you're assembling a lightweight mountain rifle or keeping a precision platform manageable in the field.

The Sendero contour offers a practical balance: enough mass for consistent accuracy and heat management during extended shooting sessions, without the heft of a true target profile. A 2.5" breech diameter and 1.20" shank diameter accommodate standard modern action interfaces, making this a straightforward fit for contemporary bolt-action platforms. This is a blank, so you'll need a qualified gunsmith to install headspace, thread the muzzle, and finish the rifle—but that control over the build lets you create exactly the rifle you need.

If you're building a long-range hunting rifle or precision competition gun and want to start with a carbon fiber barrel engineered for real performance, this PROOF Research blank deserves serious consideration.

Key Features

• Carbon fiber construction for lightweight rigidity and thermal stability
• .264 caliber for flat-shooting, extended-range capability
• 1:7.5 twist rate optimized for modern .264 projectiles
• 20" barrel length—compact enough for field use, long enough for velocity and ballistic advantage
• Sendero contour balances accuracy and weight
• Standard 2.5" breech and 1.20" shank for modern bolt-action platforms
• Just 2 lbs 13 oz—ideal for mountain and backcountry builds

Specifications

Frequently Asked Questions

What do I need to do to install this barrel?

This is a blank barrel, which means you'll need a qualified gunsmith to set headspace, thread the muzzle end, and install it on your action. If you're building a complete rifle, the gunsmith will handle those critical steps and get your rifle ready to shoot.

What actions will this barrel fit?

The 2.5" breech diameter and 1.20" shank diameter are standard for modern bolt-action platforms. Check with your gunsmith or action manufacturer to confirm compatibility with your specific action, as some custom actions may have different specifications.

Why choose .264 caliber?

The .264 is known for excellent ballistics, a flat trajectory, and strong downrange energy retention. The 1:7.5 twist rate in this barrel is optimized to stabilize the heavier, modern .264 projectiles that take full advantage of the cartridge's inherent performance.

Is this barrel good for long-range hunting?

Yes. The 20" length, carbon fiber weight savings, and Sendero contour make it well-suited for field hunting rifles where you want precision and reasonable portability. Its thermal stability also supports extended strings of fire at the range.