Proof Research 106426 Bolt Action .284 Winchester 16.5" 1:8 Twist Sendero Carbon Fiber Wrapped Barrel

The Proof Research 106426 is a carbon fiber wrapped bolt-action rifle barrel blank chambered in .284 Winchester. Cut to 16.5" with a 1:8 twist rate that stabilizes the heavier 7mm projectiles typically loaded for this case, this blank is profiled in the popular Sendero contour - a heavy, straight taper that pairs naturally with rigid chassis systems and target-style stocks used on long-range and backcountry hunting rifles.

Proof Research builds these barrels around a fluted stainless steel core that is then wrapped in a high-modulus carbon fiber sleeve bonded with an aerospace-grade epoxy. The result is a Sendero-contour blank weighing roughly 2 lbs 6 oz while shedding heat noticeably faster than a comparable all-steel barrel, helping maintain consistent accuracy across extended strings of fire and improving the overall weight distribution of a mountain or precision rifle build. This blank ships with a 2.5" breech length and a 1.20" shank diameter, giving your gunsmith the key dimensions needed to fit it to a range of popular long-action bolt receivers used in custom hunting and precision rifle applications.

Sold as a barrel blank rather than a fully headspaced, threaded, and finished factory assembly, the 106426 is profiled in the Sendero contour and ready for your gunsmith to machine the action-specific tenon, breech, and muzzle threads to your build. Whether you are assembling a backcountry .284 Winchester hunting rifle or stepping up a precision long-range platform, this Proof Research carbon fiber Sendero blank delivers match-grade accuracy potential with the lightweight handling Proof barrels are known for.