Description
Proof Research earned its reputation building carbon fiber barrels that hold precision-steel accuracy while cutting serious weight, and this .264 caliber blank is a great starting point for a custom bolt action. It starts life as a full-profile, match-grade 416R stainless steel blank made in Proof's firearms division, then gets turned down to a reduced contour and wrapped in high-strength, aerospace-grade carbon fiber. That wrap isn't just for looks. Carbon fiber pulls heat out through the barrel wall and along its length, so the barrel cools faster and holds its group over longer strings of fire.
What the Sendero Contour Brings to a .264 Build
This one is cut to a 20-inch Sendero contour with a 1:8 twist and four grooves, a combination that stabilizes the heavier, high-BC 6.5mm bullets a lot of long-range and hunting loads run today. The shorter 20-inch length keeps things handy and quick to point without giving up much velocity, which makes it a smart pick for a mountain rifle or a do-it-all precision gun. Proof lists this blank at 2 pounds 13 ounces, a big chunk lighter than a comparable steel Sendero, and that difference shows up in reduced swing weight the moment you shoulder the finished rifle.
Getting the .264 Sendero Barrel Blank Chambered
Keep in mind this ships as a blank, not a finished barrel. It comes with a 2.5-inch breech length and a 1.20-inch shank diameter, and your gunsmith handles the threading and chambering to match your action and cartridge of choice, whether that's 6.5 Creedmoor, 6.5 PRC, 260 Rem, or another .264 round. The rifling is single-point cut, lead lapped, and inspected at multiple stations along the way, so the bore quality is there before you ever pick a chamber. If you're building something light and accurate from the action up, this is the kind of barrel that lets you do it right.
Key Specifications
- Manufacturer: Proof Research
- Manufacturer Part Number: 105504
- UPC: 843068105504
- Model: Bolt Action Barrel Blank
- Caliber: .264 Caliber (6.5mm)
- Barrel Length: 20 inches
- Twist Rate: 1:8"
- Grooves: 4
- Contour: Sendero
- Bore Type: Rifled (single-point cut, lead lapped)
- Barrel Type: Blank
- Finish: Carbon Fiber Wrapped
- Core Material: 416R Stainless Steel
- Breech Length: 2.5 inches
- Shank Diameter: 1.20 inches
- Barrel Weight: 2 lbs 13 oz
What’s Included
- Proof Research .264 caliber 20-inch Sendero carbon fiber bolt action barrel blank
Frequently Asked Questions
Is this Proof Research barrel blank ready to shoot out of the box?
No, it ships as a blank rather than a finished barrel. Your gunsmith will thread the shank to fit your action and cut the chamber for your chosen .264 cartridge. Plan on that fitting work before it goes on a rifle.
What cartridges work with the .264 caliber 20-inch Sendero blank?
The .264 bore and 1:8 twist cover the popular 6.5mm chamberings, including 6.5 Creedmoor, 6.5 PRC, and 260 Remington. The 1:8 twist does a good job stabilizing the heavier high-BC 6.5mm bullets used in long-range and hunting loads. Your gunsmith can chamber it for whatever .264 round fits your build.
How much lighter is this carbon fiber barrel than a steel one?
Proof Research states its carbon fiber barrels run up to 64 percent lighter than traditional steel barrels of a similar contour. This blank comes in around 2 pounds 13 ounces, which trims a lot of weight off a comparable steel Sendero. That reduction is a big reason builders reach for these on mountain and precision rifles.
Does the carbon fiber wrap actually help with heat?
Yes, the carbon fiber moves heat both through the barrel wall and along its length, so the barrel sheds heat faster than steel alone. The practical payoff is a barrel that cools quicker and holds accuracy over longer strings of fire. It also contributes to a longer barrel life.





Reviews
There are no reviews yet.