HCA .257 Cal Sendero Carbon Barrel

HCA .257 Caliber Carbon Blank

Built for shooters and rifle builders alike who demand consistency from the foundation up, the HCA .257 Caliber Carbon Cut-Rifled Blank combines precision-machined 416R stainless steel with HCA’s proprietary carbon fiber wrapping process to create a premium foundation for your next custom rifle build.

Each barrel begins with Premium 416R stainless steel and is microhoned to achieve less than 50 millionths of an inch of bore diameter variation. Maintaining exceptional consistency throughout the bore is an important part of producing a barrel capable of delivering repeatable performance from shot to shot.

Once the steel barrel has completed the machining and finishing process, it is wrapped using HCA’s proprietary hybrid fiber orientation with ultra-low resin content. Our carbon wrapping process is designed to strategically place material where it matters while minimizing unnecessary resin and weight. The result is a carbon-wrapped barrel built to provide industry-leading rigidity, weight savings, and handling characteristics expected from an HCA barrel.

With a muzzle outside diameter of approximately .900″ ± .005″, this barrel gives custom rifle builders a premium starting point for a wide range of compatible .257 caliber builds.

Features

• .257 Caliber Blank — Can be chambered for any compatible cartridges, including .25 Creedmoor, .257 Weatherby, and so on.
• Manufactured from premium 416R Stainless Steel.
• Microhoned to less than 50 millionths bore diameter variation for exceptional bore consistency.
• Single Point Cut / ECM Rifled, followed by hand-lapping for a smooth, consistent bore finish.
• Proprietary Hybrid Carbon Fiber Ultra-Low Resin Layup for strength, rigidity, and efficient weight reduction.
• Carbon fiber exterior is OD ground to a precise, clean finish.
• Available with 1.200″ and 1.170″ (Tikka shank) tennon diameters.
• Approximate Pre-Fit Weight by Length (±1 oz): 16″ / 2 lb 0 oz • 18″ / 2 lb 2 oz • 20″ / 2 lb 5 oz • 22″ / 2 lb 8 oz • 24″ / 2 lb 11 oz • 26″ / 2 lb 14 oz • 28″ / 3 lb 1 oz

HC1 Rifling™ – The Next Evolution in Barrel Technology

HC1 Rifling™ is an optional alternative to standard rifling, combining progressive twist rates with proprietary tapered land geometry to deliver a more controlled bullet transition through the bore. Designed to reduce initial engraving resistance, promote consistent bullet engagement, and enhance accuracy across a wider range of loads, HC1 represents HCA’s largest step forward in precision barrel technology. When choosing HC1, simply select your desired twist rate from the standard options, which will serve as the barrel’s final twist rate at the muzzle.

LEAD TIMES ARE CURRENTLY RUNNING 12–14 WEEKS.

Looking for a barrel that’s ready for your specific rifle? Check out our PREFIT barrel services as well.

Note: HCA blank barrels ship approximately 2.5″ over the finish length. We advise removing approximately 1.5″ of material from the muzzle end, and 1″ from the tennon end during final fitting and chambering.

(Not seeing the barrel length, caliber, or twist rate you’re after? Reach out to us. While we can’t guarantee every configuration, we do our best to accommodate custom requests and are happy to discuss your build.)