Proof Research Carbon Fiber Barrel Blank 264 Caliber, 6.5mm 18" Sendero Contour 1:8" Twist

Overview

The Proof Research carbon fiber barrel blank is a .264 caliber (6.5mm) match-grade barrel featuring an 18-inch length, Sendero contour, and a 1:8-inch twist rate. Built with a core of double-stress relieved 416R stainless steel that is cut-rifled, lapped, and borescope-inspected, the barrel is wrapped in aerospace-grade carbon fiber using a helical wrapping pattern. This construction provides a high strength-to-weight ratio while optimizing longitudinal thermal diffusivity. The design allows the barrel to dissipate heat efficiently through its wall thickness, ensuring faster cooling and sustained match-grade accuracy over extended strings of fire.

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