The Proof Bbl Cf Blank Bolt .308 Sendero Light 16.5 from Proof Research delivers a high-precision platform tailored for serious riflesmithing and performance hunting, combining a 16.5-inch Sendero Light contour with a 10-inch twist to stabilize a wide range of .308 projectiles. This barrel assembly features a 2.5-inch breech and a 1.20-inch shank diameter, designed to integrate seamlessly with compatible action heads while maintaining rigid, repeatable accuracy in field conditions and on the range. Engineered from advanced carbon fiber-wibered barrel blanks, it delivers notable stiffness and heat resistance without sacrificing weight, keeping the rifle comfortably maneuverable for long-range shots and dynamic stalking alike. The lightweight profile, weighing 2lbs-4oz, enhances balance and reduces fatigue during extended sessions, while the precise 10-twist rate ensures reliable performance across popular .308 loads. Ideal for precision shooters seeking a compact, field-ready build, this barrel supports tight groupings, quick follow-up shots, and consistent velocity retention, making it an excellent choice for rugged mountain hunts, critical long-range engagements, and versatile hunting scenarios where reliability and accuracy matter most.