The Proof Research 106471 Bolt Action Barrel Blank in 284 Caliber with a 22" Sendero Contour, 1:8" twist and 5 grooves delivers precision engineering for serious rifle builds, featuring a carbon fiber wrapped finish that enhances rigidity, reduces weight, and improves heat management for extended shooting sessions. This rifled bolt action barrel is designed as a blank, enabling skilled builders to tailor chambering and bolt compatibility while benefiting from Proof Research's renowned Sendero contour geometry, which promotes consistent harmonics and predictable barrel harmonics across a wide range of loads. With a 22" length, the carbon fiber wrapped barrel balances elongation of velocity with maneuverability, making it an ideal choice for versatile field rifles and benchrest-style builds alike. The combination of a 1:8" twist and five grooves supports a broad catalog of projectiles, delivering stable accuracy with heavier .284-caliber bullets without sacrificing rate of fire or feed reliability. Engineers, gunsmiths, and enthusiasts seeking to upgrade or custom-build a high-performance bolt action rifle will appreciate the durability, heat dissipation, and rifle barrel performance that Proof Research provides through every cut and finish.