The Proof Research Sendero .308 Winchester carbon fiber barrel blank (brand part number 107959) is a 26-inch unchambered barrel for a gunsmith to fit to a long-range or precision bolt-action build. It uses the full-weight Sendero contour and is wrapped from aerospace-grade carbon fiber over a 416R stainless steel liner, cutting barrel weight by as much as 64 percent versus a comparable steel barrel. The extended 26-inch length wrings maximum velocity out of .308 Win loads, making this blank a strong choice for a dedicated long-range or F-Class-style rig where every extra foot-per-second at distance matters. Chambering and thread work are left to the buyer’s gunsmith of choice.

Key Specifications

• Barrel length in the blank measures a full 26 inches, maximizing velocity for long-range .308 Winchester shooting.
• Rate of twist is 1:9, matched to standard and heavier .308 Win bullet weights for stable long-range flight.
• Breech length is 2.5 inches, the dimension a gunsmith needs to chamber this blank to the buyer’s action.
• Shank diameter holds at 1.20 inches, matching common bolt-action barrel shank tooling.
• Contour is the full-weight Sendero profile, favoring barrel rigidity and heat management for sustained strings of fire.
• Finished weight comes in around 3 pounds 3 ounces, notably lighter than a comparable 26-inch steel barrel.
• Construction pairs a 416R stainless steel liner with a carbon-fiber wrap for faster cooling between shots.
• Weight savings run up to 64 percent lighter than a comparable steel barrel of the same contour and length.

Frequently Asked Questions

Is this barrel finished and ready to install? No, it ships as an unchambered blank. A gunsmith needs to chamber, thread, and fit it to the buyer’s specific bolt-action receiver.

Why choose a 26-inch length in .308 Winchester? A longer barrel gives .308 Win loads more time to burn powder before the bullet exits, adding velocity that helps flatten trajectory at long range.

Does the carbon-fiber wrap affect accuracy? No, it is built for match-grade accuracy. The wrap reduces weight and improves heat dissipation, which helps the barrel hold its point of impact through longer strings of fire.

Buy the Proof Research Sendero .308 Win 26in Barrel Blank

Order this Proof Research Sendero .308 Winchester carbon fiber barrel blank from a Lubbock, Texas gun shop for your next long-range build. See more calibers and contours in our rifle barrels lineup.