PROOF Research Bolt-Action Barrel Blank — .264 Cal (6.5mm) | 22" | Sendero Contour | 1:7.5" Twist | 4-Groove Rifling | Carbon Fiber–Wrapped | SKU 105511 | UPC 843068105511

Build a mountain-light rifle with match-grade muscle. The PROOF Research .264 Cal (6.5mm) Bolt-Action Barrel Blank combines a hand-lapped stainless core with a proprietary carbon fiber wrap to deliver heavy-contour precision at a dramatically lower weight. Cut in the sought-after Sendero contour and tuned with a 1:7.5" twist and 4-groove rifling, this 22-inch blank is ideal for modern high-BC 6.5mm projectiles, offering superb stability for long, sleek bullets while shedding heat quickly and maintaining stiffness for consistent point of impact.

Why Choose a PROOF Carbon Fiber–Wrapped Barrel Blank?

• Heavy-barrel accuracy without the heft: Carbon fiber delivers exceptional stiffness-to-weight, so you get the harmonics and POI consistency of a steel heavy contour in a lighter, easier-carrying package.

• Runs cooler, groups longer: The wrap enhances thermal conductivity and dampens vibration, helping reduce POI shift over extended strings and variable temperatures.

• Sendero contour advantage: A proven long-range profile that balances rigidity, weight, and handling—perfect for hunting rifles that still need match-grade precision.

• Twist for modern 6.5 bullets: The 1:7.5" twist stabilizes today’s heavy, high-BC .264 projectiles (think 140–156gr class), keeping them asleep through transonic and beyond.

• Blank format = custom freedom: Chamber it for your preferred 6.5mm cartridge (e.g., 6.5 Creedmoor, .260 Rem., 6.5 PRC, etc.), set your exact tenon, shoulder, and muzzle specs, and tailor the crown to your build.

• Proven PROOF pedigree: Trusted by top backcountry hunters and long-range competitors for repeatable accuracy and field reliability.

Optimized for Long-Range Hunting & Practical Precision

• Carry farther: Significant weight savings at the muzzle improves balance and reduces fatigue on steep hikes and long stalks.

• Spot your own impacts: Cleaner recoil return and consistent harmonics help you stay in the scope and make fast, ethical follow-up shots.

• Suppressor/brake ready (once machined): Plenty of material to cut standard 5/8-24 or your preferred thread pattern and crown for brakes or cans.

Build Notes (Gunsmith Guidance)

1. Chambering: Suitable for .264/6.5mm cartridges; confirm freebore and throat for your bullet length/COAL and magazine constraints.

2. Twist & bullets: The 1:7.5" twist excels with 140–156gr long-ogive bullets; still excellent with popular 130–140gr hunting loads.

3. Muzzle work: Choose a precision crown (11° target, recessed, etc.) and thread concentric to bore for brakes/suppressors.

4. Torque & bedding: Pair with a quality action, proper torque values, and solid bedding/stock interface to realize the blank’s full potential.

5. Heat discipline: Carbon helps, but allow reasonable cooling during break-in and extended strings to preserve peak accuracy.

Typical Use Cases

• Ultralight long-range hunting rifles where ounces matter and first-round hits count

• Crossover rigs for both competition-style practice and backcountry hunts

• Custom builds that demand a premium blank with cutting-edge materials and consistency

Key Features at a Glance

• Caliber: .264 (6.5mm) barrel blank

• Length: 22 inches

• Contour: Sendero (carbon fiber–wrapped over stainless core)

• Twist Rate: 1:7.5" (ideal for heavy, high-BC bullets)

• Rifling: 4 grooves

• Construction: Match-grade stainless core, carbon fiber wrap

• Format: Unchambered barrel blank (gunsmith machining required)

• SKU: 105511 | UPC: 843068105511

Specifications

Care & Maintenance

• Clean like a premium stainless match barrel with quality solvents and non-marring tools.

• Avoid aggressive, non-coated rods; use a bore guide to protect the throat.

• Let the barrel cool between long strings to extend life and preserve zero.

• Verify muzzle device torque and suppressor alignment periodically.

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Build lighter, shoot tighter, and go farther—choose the PROOF Research .264 Cal, 22" Sendero Carbon Fiber–Wrapped Barrel Blank (1:7.5, 4-groove) for a custom rifle that carries like a feather and hits like a hammer.
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