The Proof Research Proof Bbl Cf Blank Bolt .264 Sendero 20 1-7.5 offers a precision-focused pairing of caliber, contour, and balance designed for serious rifle builds and demanding field use. This 264-caliber barrel features a 20-inch length with a 7.5 twist rate and a compact 2.5-inch barrel breech, delivering stable long-range performance across diverse game and target disciplines. With a 1.20-inch shank diameter and the Sendero contour, it provides the stiffness and harmonics needed for consistent muzzle velocity and trajectory, while maintaining a practical overall weight of 2lbs-13oz for enhanced handling in extended hunts or tactical scenarios. Built by Proof Research, a trusted name in high-performance firearm components, this barrel is engineered to optimize accuracy, heat management, and durability under rigorous shooting conditions. Whether upgrading an existing rifle or assembling a precision rifle platform, the 264 Sendero blank bolt setup supports repeatable shot placement, efficient barrel cooling, and reliable chambering for repeatable runs at distance. Its integration promotes smooth action cycling and predictable POI shifts, making it a dependable foundation for long-range shooting success and refined field versatility.