PROOF Research Bolt-Action Barrel Blank — .264 Cal (6.5mm) | 28" | Competition Contour | 1:7.5" Twist | 4-Groove Rifling | Stainless Steel | SKU 113721 | UPC 843068113721

Chase podium-level precision with a blank built for match pressure. The PROOF Research .264 Cal (6.5mm) 28" Competition Contour Barrel Blank is a hand-lapped stainless steel blank engineered to deliver extreme consistency, tight vertical, and long string repeatability for PRS/NRL-style practical matches, F-Class, and high-performance hunting crossovers. With a competition contour for thermal stability, a fast 1:7.5" twist to stabilize heavy high-BC bullets, and 4-groove rifling for superb gas seal and minimal jacket deformation, this blank is the foundation for a winning custom rifle.

Why Builders Choose This PROOF Stainless Blank

• Match-grade stainless core: Premium stainless steel, hand-lapped to reduce fouling and produce a uniform finish for consistent velocities and minimal flyers.

• Competition contour: Heavier contour supports thermal stability, consistent harmonics, and reduced POI shift during long shot strings—ideal for barricade-to-prone stages and hot summer relays.

• Optimized twist for heavy 6.5 bullets: The 1:7.5" twist excels with modern 140–156gr projectiles, keeping them fully stabilized through transonic and tough wind.

• 4-groove rifling: Fewer lands can reduce jacket stress and fouling while maintaining strong gas seal—translating to tight vertical at distance.

• 28-inch length = free velocity: Extra barrel length can add meaningful velocity for flatter trajectories and lighter wind holds.

• Blank = total control: Chamber for your mission—6.5 Creedmoor, 6.5 PRC, .260 Rem., 6.5×47 Lapua, 6.5-284 Norma, and more. Set the exact tenon, freebore, throat, and crown your build demands.

Built for Precision Under Pressure

• Stage to stage consistency: Competition contour resists thermal wandering, keeping your zero and dope trustworthy even as the round count climbs.

• Cleaner recoil signature: Proper stiffness promotes repeatable harmonics so the rifle tracks and returns to target predictably—especially with a brake or suppressor.

• Load development friendly: Uniform bore and throat finish simplify tune discovery; expect fast nodes with popular powders and heavy-for-caliber bullets.

Ideal Applications

• PRS/NRL practical precision gas-gun-legal bolt builds and open-class rigs

• F-Class / long-range where vertical control matters most

• High-performance hunting crossovers requiring match accuracy and extended reach

Gunsmithing & Build Notes

1. Chambering: Choose cartridge, freebore, and throat to match your bullet length and COAL (AICS mag length, AW mags, or BDL).

2. Muzzle work: Finish with a precision crown and threads—5/8-24 TPI is common for 6.5mm brakes/suppressor mounts. Cut concentric to bore and confirm shoulder squareness.

3. Action & bedding: Pair with a true, quality action; bed consistently or use a proven chassis system. Torque to manufacturer specs.

4. Load & zero: Expect excellent results with 140–156gr bullets. True your solver with actual drops (400–1,000 yds+).

5. Heat discipline: Stainless competition blanks manage heat well; still allow sensible cool-downs to preserve throat life.

Real Advantages You’ll Notice

• Velocity headroom from the 28" tube for flatter flight and reduced wind drift

• Confidence in long strings thanks to a contour that minimizes thermal POI shift

• Repeatable precision from hand-lapped stainless and consistent 4-groove geometry

Key Features at a Glance

• Caliber: .264 (6.5mm) barrel blank (unchambered; gunsmith required)

• Length: 28 inches

• Contour: Competition (stainless steel)

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

• Rifling: 4 grooves

• Material/Finish: Stainless steel (match-grade, hand-lapped)

• Format: Unchambered; custom throat, crown, tenon, and thread to spec

• SKU: 113721 | UPC: 843068113721

Specifications

Care & Maintenance

• Clean with a coated one-piece rod, bore guide, and quality solvent; avoid aggressive steel tools.

• Track round count and inspect throat/leade periodically for peak consistency.

• Verify muzzle device torque and suppressor mount alignment at intervals.

• Allow moderate cool-down during heavy practice days to extend barrel life.

SEO Highlights (for Merchandising & Search)

PROOF Research 6.5mm stainless barrel blank, .264 competition contour barrel 28", 1:7.5 twist 4-groove 6.5 Creedmoor / 6.5 PRC blank, match-grade stainless rifle barrel, PROOF 113721, UPC 843068113721, long-range precision barrel blank, stainless steel 6.5 barrel for PRS NRL F-Class.

Build for the podium—choose the PROOF Research .264 Cal, 28" Competition Contour Stainless Barrel Blank (1:7.5, 4-groove) for velocity, stability, and match-winning precision.
The End