The Proof Research 110157 Bolt Action Barrel Blank 308 Cal 24" Sendero Contour 1:9" Twist 5 Grooves, Carbon Fiber Wrapped delivers a precision-focused upgrade for rifles requiring a high-performance carbon fiber wrapped solution. This 24-inch barrel blank features the distinctive Sendero contour, a 1:9" twist rate, and five grooves, engineered to optimize stability and accuracy across a range of .308 Winchester loads while maintaining a lighter profile through carbon fiber wrapping. With a rifled bore and a true bolt-action design, it supports meticulous handloading and custom builds aimed at long-range performance, varmint, and big-game hunting applications where consistency and reduced weight matter. The carbon fiber finish not only contributes to a clean, modern aesthetic but also enhances stiffness-to-weight ratio and heat management under sustained-fire scenarios. Builders and gunsmiths will appreciate the compatibility and reliability of this blade-length option when configuring a precision chassis or traditional rifle platform. The result is a tailored barrel solution that blends advanced materials with proven geometry to achieve improved tracking, reduced muzzle rise, and repeatable shot placement across demanding field conditions.