The Proof Research barrel blank (brand part no. 101049) is an unchambered .338-bore carbon fiber bolt-action blank, 24 inches long with a 1:9.4 twist in Proof’s Sendero contour. It is a blank, not a pre-fit or a drop-in barrel: a gunsmith threads, chambers and fits it to your action and your cartridge. A .338 bore is the .338 bore, so it can be chambered for cartridges such as the .338 Winchester Magnum or .338 Lapua Magnum, and Proof lists it at 3 lb 6 oz. Proof wraps it in aerospace-grade carbon fiber, which it rates up to 64 percent lighter than a steel barrel of similar contour, with improved heat dissipation for cooler, longer-lasting barrels.

Key Specifications

• It is an unchambered barrel blank, for gunsmith threading, chambering and fitting.
• The bore is .338, the .338 bore.
• Blank length is 24 inches.
• The twist rate is 1:9.4.
• The contour is Sendero.
• Proof lists the weight at 3 lb 6 oz.
• It is carbon fiber wrapped, rated up to 64 percent lighter than steel of similar contour.
• The carbon wrap gives improved heat dissipation for cooler, longer-lasting barrels, per Proof.
• It is a bolt-action blank, made for custom precision and hunting rifle builds.

Frequently Asked Questions

Is this barrel chambered? No. It is an unchambered blank; a gunsmith threads, chambers and fits it to your action.

What cartridges can it be chambered for? A .338 bore suits cartridges such as the .338 Winchester Magnum or .338 Lapua Magnum; your gunsmith chambers it for the one you choose.

Why carbon fiber? Proof rates its carbon fiber wrap up to 64 percent lighter than a steel barrel of similar contour, with better heat dissipation over long strings.

Buy the Proof Research Carbon Fiber Barrel Blank, .338 Bore, 24-Inch, 1:9.4, Sendero

A 24-inch carbon blank gives your gunsmith a light, accurate starting point for a custom build. Order it with the rest of our rifle barrels from our Lubbock, Texas gun shop for fast, insured shipping.