The Proof Research Proof Bbl Cf Blank Bolt .308 Sendero 16.5 1-8 delivers precision performance for high-grade bolt-action builds, combining a caliber of 308 with a compact 16.5-inch Sendero-contoured barrel thats optimized for stability and controlled velocity. This barrel features an 8 twist rate, a 2.5 barrel breech, and a shank diameter of 1.20, all engineered to deliver consistent shot-to-shot accuracy in demanding field and range conditions. Weighing 2lbs 6oz, it offers a balanced, lightweight feel that enhances maneuverability without sacrificing rigidity or durability, making it ideal for versatile hunting setups and precision rifle projects. The Sendero contour supports superior heat dissipation and sustained performance in rapid-fire sequences, while the blank bolt compatibility ensures dependable chambering and reliable lockup for repeatable groups. Built by Proof Research, this barrel is designed to maximize magazine-fed accuracy, muzzle stability, and point-of-impact consistency across common .308 loadings, enabling shooters to achieve tight groups and reliable performance in field conditions, target days, and competitive shooting scenarios. Whether upgrading an existing build or starting a new rifle project, this barrel provides a solid foundation for precision, reliability, and long-term durability.