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This is a blank barrel ready for chambering and threading by your gunsmith. Proof Research pairs a full-profile 416R stainless steel core with aerospace-grade carbon fiber wrapping to create a precision barrel that balances accuracy with weight savings. The barrel blank arrives un-chambered, giving you the flexibility to build exactly what you need for your 277 cartridge setup.
The carbon fiber wrapping is engineered using Proof's patented process, which gives the barrel a specific strength up to 30 times that of stainless steel and stiffness 7 times greater. That stiffness translates directly to consistent accuracy through longer shooting strings and extended sessions. What really sets this design apart is thermal management: the helical fiber orientation actively dissipates heat along the length of the barrel, cooling faster than comparable steel and maintaining point of impact through multiple shots. This matters whether you're running factory loads or reloading your own.
At 3 pounds 1 ounce, you're saving roughly 50 percent of the weight you'd carry with an all-steel Sendero profile. The 8.4 twist rate suits a wide range of 277 projectiles, and the 24-inch length provides solid velocity with manageable recoil. The barrel features a 1.20-inch shank diameter and 2.5-inch breech length, making it compatible with most modern bolt-action stocks designed around M24 taper profiles. Single-point cut rifling and lead lapping ensure consistent bore geometry right out of the box.
Your gunsmith will handle threading, chambering, and crowning during the build process. This gives you full control over chamber design, throat length, and muzzle thread configuration. Proof Research barrels have a track record of delivering sub-1/2-MOA accuracy when properly installed, and customers consistently report clean performance across extended use. The Sendero contour works particularly well in hunting rifles and precision builds where weight matters but accuracy cannot be compromised.
A gunsmith must thread, chamber, and crown the blank before installation on your action. Proof Research barrels arrive with the stainless steel core ready for these finishing steps. Once your gunsmith completes the work, you'll have a completed barrel ready to install on your bolt action.
This barrel weighs 3 pounds 1 ounce compared to roughly 6-6.5 pounds for an equivalent all-steel Sendero profile. That's about 50 percent lighter. The weight savings multiply across a complete build, which is why many hunters pair Proof barrels with lightweight stocks to achieve packable rifles without sacrificing accuracy.
The Sendero contour is compatible with most modern bolt-action stocks designed around M24 taper profiles, though you may need minor fitting. Check with your gunsmith about your specific action and stock combination. The 1.20-inch shank diameter and 2.5-inch breech length are standard dimensions that work with most major action platforms.
Proof Research barrels consistently deliver sub-1/2-MOA accuracy when properly installed. The carbon fiber construction adds stiffness without adding weight, which reduces harmonic vibration and improves consistency through longer shooting sessions. Heat dissipation is better than steel, which helps maintain point of impact across extended shooting.
| UPC | 843068130513 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 130513 |
| Length | 24'' |
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