PROOF Research Bolt-Action Barrel Blank — .284 Cal (7mm) | 22" | Sendero Light Contour | 1:8" Twist | 5-Groove Rifling | Carbon Fiber–Wrapped | SKU 106228 | UPC 843068106228
Build a lighter rifle that still punches like a heavyweight. The PROOF Research .284 Cal (7mm) Bolt-Action Barrel Blank combines a hand-lapped stainless core with a proprietary carbon fiber wrap to deliver heavy-barrel precision in a trim, field-friendly Sendero Light contour. At 22 inches with a 1:8" twist and 5-groove rifling, this blank is tuned for modern high-BC 7mm bullets while cutting front-end weight for better balance, quicker transitions, and less fatigue on demanding hunts and long match days.
Why Choose This PROOF Carbon Fiber Barrel Blank
Heavy-barrel accuracy, mountain-rifle weight: The carbon wrap boosts stiffness-to-weight, providing consistent harmonics and POI stability without the mass of a full steel Sendero.
Sendero Light contour: A proven long-range profile—lighter than Sendero, yet rigid enough for precision with today’s 7mm cartridges.
Optimized twist for modern 7mm bullets: The 1:8" twist stabilizes popular 160–180+ grain high-BC projectiles (and performs excellently with 150–160 grain hunting loads).
Runs cooler, groups longer: Carbon fiber enhances heat dissipation and dampens vibration to reduce thermal shift during extended strings.
Blank = custom freedom: Chamber to your application—7mm PRC, 7mm Rem Mag, .280 Ackley Improved, 7mm-08 Rem, 7mm SAUM, and more. Set your preferred freebore, tenon, shoulder, crown, and thread pattern.
PROOF pedigree: Trusted by elite hunters and practical precision shooters for repeatable accuracy in harsh environments.
Ideal Use Cases
Ultralight long-range hunting rifles (Western big game, backcountry, high elevation)
Precision crossover builds used for both competition practice and the field
Suppressed, travel-ready rigs needing stable POI and manageable overall length
Gunsmithing & Build Notes
Chambering: Configure for your chosen 7mm cartridge, bullet length/COAL, and magazine constraints (AICS/short or long action).
Muzzle work: Finish to your preference—common choices include 5/8-24 TPI for brakes/suppressors and an 11° or recessed target crown. Cut threads concentric to bore.
Fit & bedding: Pair with a quality action and consistent bedding; torque to spec to realize the blank’s full potential.
Load development: Expect excellent results with 160–175/180gr high-BC bullets; record real-world velocities and true your ballistic solver at distance.
Heat discipline: Carbon fiber helps, but let the barrel cool between long strings to preserve throat life and peak precision.
Real Advantages You’ll Feel
Better balance in field positions: Less muzzle weight steadies kneeling, seated, and off-pack shots.
Spot your own impacts: Consistent harmonics and reduced recoil movement (especially with a brake or can) help you stay in the glass.
Carry farther with less fatigue: Trim ounces where they count and keep your rifle lively on steep sidehills.
Key Features at a Glance
Caliber: .284 (7mm) barrel blank (unchambered; gunsmithing required)
Length: 22"
Contour: Sendero Light (carbon fiber-wrapped over stainless core)
Twist Rate: 1:8" (ideal for heavy, long 7mm bullets)
Rifling: 5 grooves
Construction: Hand-lapped stainless steel core + proprietary carbon wrap
Finish: Carbon fiber exterior, stainless steel at tenon/muzzle after machining
SKU: 106228 | UPC: 843068106228
Specifications
| Attribute | Detail |
|---|
| Product Type | Bolt-action barrel blank |
| Caliber | .284 (7mm) |
| Length | 22" |
| Contour | Sendero Light |
| Twist | 1:8" |
| Rifling | 5-groove |
| Core Material | Match-grade stainless steel, hand-lapped |
| Wrap | Carbon fiber, engineered layup |
| Chamber | Unchambered (custom gunsmithing required) |
| Muzzle | Unfinished; custom thread/crown per build |
| SKU | 106228 |
| UPC | 843068106228 |
Care & Maintenance
Clean like a premium stainless match barrel—use a bore guide, coated rod, and quality solvent.
Avoid aggressive steel tools; let solvents work and use non-marring jags/brushes.
Verify muzzle device torque and suppressor alignment periodically.
Allow reasonable cool-down during break-in and during extended firing.
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Build lighter, shoot flatter, and stretch your effective range—choose the PROOF Research .284 Cal, 22" Sendero Light Carbon Fiber–Wrapped Barrel Blank (1:8, 5-groove) for a custom rifle that carries like a mountain rig and groups like a match gun.
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