Proof Research 264 Caliber 4-Groove Twist Carbon Fiber Barrel Blank

The Proof Research 264 Caliber 4-Groove Twist Carbon Fiber Barrel Blank is purpose-built for gunsmithing custom bolt-action rifles in .264 caliber. If you're building a long-range hunting rig or precision target rifle and want to shed weight without sacrificing accuracy or durability, this is the blank your gunsmith needs to start with. Proof Research has engineered these carbon fiber barrels to deliver match-grade accuracy while keeping your rifle substantially lighter than a traditional steel barrel would allow—we're talking up to 64% weight reduction depending on your configuration.

Carbon fiber construction offers genuine advantages that go beyond the scale. The material is significantly stronger than steel on a weight-for-weight basis, resists cosmetic damage from normal field use and storage, and manages heat differently than steel. That improved heat dissipation means your barrel runs cooler during high-volume shooting sessions, which supports both longevity and consistency. You won't see point-of-impact shift when you're running strings of fire—the reduced harmonic vibration that carbon fiber delivers keeps your groups tight and predictable.

This is a blank, ready for your gunsmith to thread and chamber to your specifications. Whether you're building a mountain hunting rifle where ounces matter or a precision .264 magnum for extended-range work, starting with a Proof Research carbon blank gives you a foundation that balances performance with real-world practicality.

Key Features

• Up to 64% lighter than traditional steel barrels
• Match-grade accuracy potential
• Improved heat dissipation for cooler, longer-lasting performance
• No point-of-impact shift during sustained fire
• Reduced harmonic vibration for consistent group integrity
• Carbon fiber durability resists nicks, dings, and weather damage
• 4-groove twist in .264 caliber
• Unthreaded, unchambered blank—ready for gunsmith finishing

Specifications

Frequently Asked Questions

Can my gunsmith use this blank for any bolt-action rifle?

Yes, this is a barrel blank designed to be threaded and chambered by your gunsmith. The specific fit and function depend on your action, so work with your smith to ensure it's the right dimension and contour for your build.

How much weight will I actually save compared to a steel barrel?

Proof Research carbon fiber barrels can be up to 64% lighter than traditional steel barrels of comparable length and contour. The exact savings depend on the final dimensions your gunsmith machines.

Will a carbon fiber barrel hold zero and maintain accuracy like steel?

Yes. These barrels deliver match-grade accuracy, maintain point-of-impact consistency during high-volume fire, and exhibit reduced harmonic vibration compared to steel—all of which support reliable, repeatable precision.

What's included, and what do I need to do before using it?

You receive the barrel blank unthreaded and unchambered. You'll need to send it to a gunsmith to thread the breech end and chamber it for your specific bolt-action rifle and cartridge specifications.