Proof Research Bolt Action Barrel Blank 264 Cal 28" Competition Contour 1:7.50" Twist 4 Grooves, Stainless Stainless 113721

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 Chambering: Choose cartridge, freebore, and throat to match your bullet length and COAL (AICS mag length, AW mags, or BDL). 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. Action & bedding: Pair with a true, quality action; bed consistently or use a proven chassis system. Torque to manufacturer specs. Load & zero: Expect excellent results with 140–156gr bullets. True your solver with actual drops (400–1,000 yds+). 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 AttributeDetailProduct TypeBolt-action barrel blankCaliber.264 (6.5mm)Length28"ContourCompetitionTwist1:7.5"Rifling4-grooveCore MaterialMatch-grade stainless steel, hand-lappedExterior FinishStainlessChamberUnchambered (custom gunsmithing required)MuzzleUnfinished; crown/thread (e.g., 5/8-24) per buildSKU113721UPC843068113721 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