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PROOF Research built its reputation on cracking the code with carbon fiber wrapped barrels, and this .338 caliber blank is a prime example of what that engineering brings to the table. It pairs a 416R stainless steel core with an aerospace-grade carbon fiber wrap, giving you a barrel that runs up to 64 percent lighter than a traditional steel barrel of the same Sendero contour. At 26 inches with a 1:9.4 twist and 5-groove rifling, it's set up to stabilize the heavy, high-BC .338 bullets that make this caliber a favorite for reaching way out there.
Weight savings are the headline, but the carbon wrap does more than shave ounces. The material is stiffer than steel by weight and pulls heat away from the bore faster, which means your groups hold together through longer strings of fire and the barrel stays cooler in the process. You also get reduced harmonic vibration and no point-of-impact shift when you're running rounds through it, both of which matter when you're stretching a .338 out to distance. It carries the standard Sendero contour with a 1.25 inch shank diameter sized for .338 and larger calibers.
This is a blank, not a drop-in barrel, so plan on a trip to your gunsmith. It arrives ready to be threaded, chambered, crowned, and fitted to your action, which is exactly what makes it so versatile. You can spec it for a standard .338 cartridge or go the wildcat route, and it'll drop into a wide range of bolt actions once it's finished. Everything is contoured and wrapped in Columbia Falls, Montana, so you're getting a barrel made start to finish by PROOF's own crew.
For anyone piecing together a lightweight long-range or backcountry .338 rig, this blank gives you a premium foundation that hangs with the best precision steel barrels while cutting real weight off the front end.
This is a barrel blank, so it needs to be threaded, chambered, crowned, and fitted by a qualified gunsmith before it can be shot. Shipping it as a blank is what lets you chamber it for exactly the cartridge and action you want. Budget for that gunsmithing work when planning your build.
The 1:9.4 twist is a solid all-around rate for the heavier, high-BC .338 bullets that make this caliber shine at long range. It's designed to keep those projectiles stabilized for consistent accuracy way out there. If you have a specific bullet weight in mind, your gunsmith can confirm it pairs well with this twist.
PROOF Research rates these carbon fiber barrels at up to 64 percent lighter than a traditional steel barrel of the same Sendero contour. The carbon wrap surrounds a 416R stainless steel core, so you keep the accuracy of a steel bore while dropping real weight off the front of the rifle. That makes a noticeable difference on a backcountry or field build.
It does. The carbon fiber wrap dissipates heat faster than steel, so the barrel runs cooler and holds accuracy better through extended firing. You also get reduced harmonic vibration and no point-of-impact shift during high-volume fire, which keeps things predictable behind the trigger.
| UPC | 843068101056 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 101056 |
| Length | 26'' |
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