Proof Research .284 Bore PXT Sendero Bolt-Action Carbon Fiber Barrel Blank, 16.5-inch

The Proof Research .284-bore PXT Sendero Carbon Fiber Bolt-Action Barrel Blank, 16.5 inches (brand part no. 151969), is an unchambered barrel blank built in Proof Research’s Sendero contour with the company’s PXT progressive-twist rifling. Proof Research builds this blank from a match-grade 416R stainless steel core turned down to reduce weight, then wraps it in proprietary aerospace-grade carbon fiber, cutting significant weight versus a comparable all-steel barrel. This barrel is cut with Proof Research’s PXT, or PROOF Exponential Twist, rifling — a progressive twist rate that starts far more gradually than a traditional barrel before accelerating through the bore, engaging the bullet more gently to reduce engraving force, extend barrel life, and tighten group sizes. As a blank, it ships unchambered so a gunsmith can thread, chamber, and finish it to the specific .284-bore cartridge you’ve chosen.

Key Specifications

• Bored to .284 caliber, ready for gunsmith chambering to your chosen .284-bore cartridge.
• Cut to a 16.5 inch length before chambering and final fitting.
• Rifled with PXT progressive-twist rifling for reduced bullet engraving force and longer barrel life.
• Machined in Proof Research’s Sendero contour, a proven balance of stiffness and weight.
• Built around a 416R stainless steel core wrapped in aerospace-grade carbon fiber.
• Sold as an unchambered barrel blank, intended for gunsmith fitting rather than direct installation.

Frequently Asked Questions

What is PXT rifling? PXT, or PROOF Exponential Twist, is a progressive twist rate that starts more gradually than a traditional barrel before accelerating through the bore, which Proof Research states can extend barrel life and tighten groups.

Is this barrel ready to install out of the box? No, it ships as an unchambered blank that a gunsmith chambers and fits to your action and cartridge.

Buy the Proof Research .284 PXT Sendero Carbon Fiber Barrel Blank

Builders working with a gunsmith on a custom .284-bore precision rifle who want Proof’s latest progressive-twist rifling will get both weight savings and the PXT advantage with this Sendero-contour blank. Order it through our Lubbock, Texas gun shop and browse more rifle barrels from Proof Research and other trusted brands.