Proof Research - Carbon Fiber Barrel Blank - .243 (6mm) Cal - Sendero Contour
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Full specificationsProof Research
Proof Research - Carbon Fiber Barrel Blank - .243 (6mm) Cal - Sendero Contour
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Call 1-970-242-6166 or email sales@redhawkrifles.com with the competitor listing and we’ll take it from there. Read the full guarantee.
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Overview
A 6mm Sendero carbon fiber blank, ready for your gunsmith to chamber
This Proof Research .243 (6mm) Sendero blank is a carbon fiber wrapped 416R stainless barrel, sold unchambered and unthreaded for your gunsmith to finish. Choose a 16.5", 20", 22", 24" or 26" finish length with a 1:7.5 twist. Proof recommends the Sendero contour where precision and suppressor use matter more than the last few ounces.
Up to 64% lighter than steel
Proof rates a carbon fiber Sendero at up to 64% lighter than a steel barrel of the same contour. The 20" 1:7.5 blank weighs 2 lb 14 oz, the 24" weighs 3 lb 2 oz and the 26" weighs 3 lb 6 oz.
1.200" shank, 2.50" long
The shank runs 1.200" in diameter for 2.50" from the breech, then tapers to 1.0625" at 5.50" and 1.030" at 10". Those are the numbers to check against your stock's barrel channel.
One twist for the 6mm bore
1:7.5. Proof's rule is that a faster twist (lower number) stabilizes heavier, longer bullets. Check the bullet maker's twist recommendation for the specific rounds you plan to shoot.
Cut rifled 416R core
Proof starts with a match-grade 416R stainless blank, cut rifled with a single-point tool and lead lapped, turns it down, then wraps it in aerospace-grade carbon fiber with a resin from its own composites division. The wrap moves heat along and through the barrel wall, and Proof claims no point-of-impact shift during high-volume fire.
Steel at both ends
The 2.50" breech section and the last .800" at the muzzle stay solid stainless, so there is steel to thread for the action and for a muzzle device. Extra stock beyond the finish length is left on for the gunsmith to remove.
Limited lifetime warranty
Proof warrants the barrel against defects in material and workmanship for the original owner. The warranty card must be on file with Proof within 30 days of delivery.
Specifications
Bore and rifling
Sendero contour (measured from the breech face)
Muzzle diameter by finish length
Weight by variant (Proof's figures)
What ships
Fitment
Will it work with your build?
Works with
- Any bolt action once the shank is threaded to the action's tenon
- Rem 700 footprint and most modern short actions
- Cartridges: .243 Win, 6mm Rem, 6x47 Lapua, 6mm Creedmoor and similar 6mm cartridges
Will not work with
- Actions that cannot accept a 1.200" diameter shank
- Cartridges larger than the 6mm bore (use a .264 or .284 blank instead)
Your gunsmith must thread, chamber and crown the blank. The muzzle section and the extra stock at the breech are provided for the gunsmith to remove and work with. Rifle barrels ship for a flat $14.95 per order, regardless of quantity, and do not qualify for free shipping due to their size and handling requirements.
Detail
Fitting it and the fine print
What does the gunsmith do with it?
The blank arrives unthreaded and unchambered. Your gunsmith will thread the breech for your action's tenon, chamber it to your chosen cartridge, crown the muzzle, and remove the extra stock we provide at the muzzle and breech. The blank is already rifled, so the gunsmith is finishing, not boring.
Will it fit my stock's barrel channel?
Measure the diameter of your barrel channel at 10" from the breech face. The blank tapers to 1.030" at 10", so if your channel is at least that wide at that point, it should fit. The shank stays 1.200" in diameter for the first 2.50", so check your action's shank diameter too. Bring those numbers to your gunsmith.
How much accuracy should I expect?
Proof Research does not guarantee accuracy for a barrel blank sold alone. The gunsmith's work (chamber alignment, crown finish, how the threads seat into the action) affects the result as much as the barrel. Proof's match-grade core, cut rifling and lead lapping put the barrel in position to deliver, but accuracy is a system.
- Caliber
- .243 (6mm)
- Contour
- Sendero
- Twist
- 1:7.5
- Lengths
- 16.5" to 26"
- Shank
- 1.200" x 2.50"
- Condition
- Blank (unthreaded)
Works with
- Bolt actions with 1.200" diameter shank
- Rem 700 footprint and clones
- .243 Win, 6mm Rem, 6mm Creedmoor and similar
Will not work with
- Actions smaller than 1.200" shank
- Cartridges larger than 6mm bore
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Shipping
Free same day shipping
Most orders over $199 ship free. We ship same day on all in-stock orders received before 14:00 Mountain Time. Free Shipping orders use standard ground and typically deliver in 1 to 4 days. Excludes international orders, Alaska and Hawaii, and select oversized items. All orders valued over $1,000.00 ship signature required.
Overnight & expedited shipping
If you need an item fast, cost-effective expedited options are available at checkout. Most expedited orders ship via FedEx or Overnight Mail.
Local customers
We are in 2317 Grand Park Dr Unit 2B Grand Junction, CO 81505 and we stock every item we sell. We love seeing customers and encourage you to stop by — just leave a comment in the order notes during checkout.
International shipping
We ship to international shoppers in 82 countries registered with EasyExport®. Registration is free and EasyExport does not share your information, and you can register before or after you shop. See International Export for details.
Returns
Not quite perfect? Red Hawk will make it right, no matter what. Guaranteed. Most items have a 30-day window from the day the product was delivered to you. Excluded are ammo and ORM-D products, custom ordered items, items not in original condition, and international orders. Every item we sell also carries a manufacturer warranty, and we only work with manufacturers who stand behind their products.
Common questions
How do I know the items I'm buying are compatible?
Check the Fitment section above — it lists what this part works with and what it does not. If you are still unsure, call 1-970-242-6166 or use the chat icon at the bottom right of the page — our team builds precision rifles with these parts every day.
Where are you located?
2317 Grand Park Dr Unit 2B Grand Junction, CO 81505. We ship every single order from our own warehouse and take pride in being part of our local hunting and competition shooting community.
I can't find the configuration I need — can you special order it?
Absolutely. Call 1-970-242-6166.
What if there is an issue with the product I ordered?
We will make it right, no matter what. We only carry products from top-tier manufacturers who stand behind them.
Which items need to ship to an FFL?
Only serialized firearm actions and receivers require an FFL transfer. Barrels, stocks, triggers and accessories ship straight to your door.