Proof Research Carbon Fiber Barrel Blank 338 Caliber 10" Sendero Contour 1:8" Twist

Overview

The Proof Research carbon fiber barrel blank is chambered in 338 caliber with a 10-inch barrel length, a Sendero contour, and a 1:8-inch twist. Proof Research manufactures its steel barrels in-house from double-stress relieved 416R stainless steel, which is drilled, contoured, reamed, cut-rifled, lapped, and inspected via borescope to ensure consistent match-grade accuracy and durability. The barrel is wrapped in aerospace-grade carbon fiber utilizing a helical wrapping pattern that improves longitudinal thermal diffusivity. This design efficiently conducts heat away from the bore and through the barrel wall, allowing the barrel to cool rapidly and maintain accuracy over extended strings of fire.

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