Proof Research - Carbon Fiber Barrel Blank - .338 Cal - Sendero Contour
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Full specificationsProof Research
Proof Research - Carbon Fiber Barrel Blank - .338 Cal - Sendero Contour
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Overview
A stiff .338 carbon fiber blank for precision building
The Proof Sendero .338 cal blank is a rifled, contoured, carbon fiber wrapped barrel a gunsmith chambers, threads and fits to your bolt action. Pick it when precision and stiffness matter, you run a suppressor, or you want a chamber Proof does not offer as a pre-fit, wildcats included. It ships rifled and contoured with a 1.25" shank, heavier and stiffer than the Sendero Light. Finish lengths run 24" to 28" with 1:9.4 twist.
Up to 64% lighter
Proof rates its carbon fiber barrels at up to 64% lighter than steel of the same contour. On this blank that is 3 lb 6 oz at 24" and 3 lb 9 oz at 26", by our own spec table.
Sendero taper, 1.25" shank
1.25" for the first 3", 1.113" at 6", 1.073" at 10", then a muzzle of 0.939" (24") down to 0.919" (26") (Proof does not list the 28" muzzle). Heavier and stiffer than Sendero Light while keeping a strong breech.
Three lengths, all 1:9.4 twist
24", 26", or 28" finish length. All leave the factory with the same 1.25" shank and Sendero taper.
Steel where the gunsmith works
The shank and the last 0.625" at the muzzle stay bare stainless under the wrap, so the chamber, tenon threads, crown and any muzzle thread are cut in steel, not composite.
Sendero is the precision choice
Proof's choosing guide points to the Sendero, heavier and stiffer than the Sendero Light, for precision work and suppressor use.
Specifications
The blank
Weight by finish length
Sendero contour dimensions
Fitment
Will it work with your build?
Works with
- Any .338 cartridge: .338 Win Mag, .338 RUM, .338 Lapua, .340 Weatherby and similar
- Bolt actions, once a gunsmith chambers and fits it
- Suppressor use, which Proof's guide pairs with the stiffer Sendero
Will not work with
- Factory barrels: Blank only, requires gunsmith chambering and threading
This is a barrel blank, not a finished barrel. It ships rifled, contoured and unthreaded. A certified gunsmith must chamber it to your cartridge, cut the tenon threads, crown the muzzle, and fit it to your action. Rifle barrels ship flat $14.95 per order, no free shipping.
Detail
Fitting it and the fine print
What is Sendero vs Sendero Light?
Same shank, different taper: the Sendero is heavier and stiffer, and Proof's guide recommends it for precision work and suppressors; the Sendero Light is for builds where weight or stock channel room matters. The Sendero Light .338 blank is listed separately if we stock it.
Will this fit my stock or chassis?
Proof's guide says its contours run larger than factory barrels and that the stock channel should be confirmed; many aftermarket stocks are inletted for the Proof Sendero and some need channel work. The contour measures 1.25" for the first 3", 1.113" at 6" and 1.073" at 10" from the breech face.
What does the gunsmith need to do?
The gunsmith chambers it to your cartridge, cuts the tenon thread, crowns the muzzle and fits it to your action; the shank and the last 0.625" at the muzzle are bare steel, so that work is done in steel. Proof says the job needs special tools and a qualified gunsmith.
What about break-in and maintenance?
Proof's break-in is shoot three, clean, shoot five, clean, with no moly-coated bullets for the first 100 rounds. Proof barrels carry a warranty for defects in material and workmanship to the original owner. Register your warranty card within 30 days of delivery.
- Caliber
- .338
- 24" weight
- 3 lb 6 oz
- 26" weight
- 3 lb 9 oz
- Contour
- Sendero
- Shank diameter
- 1.25"
- Twist rate
- 1:9.4
Works with
- .338 Win Mag and larger
- Bolt actions, gunsmith fitted
- Suppressors and precision
Will not work with
- Factory barrels
Product images
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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.