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The PROOF 152294 is an 18 inch .264 caliber bolt-action barrel blank built around Proof Research's carbon fiber wrapped construction and their PXT rifling. It's the kind of barrel a guy reaches for when he's building a 6.5mm rifle from the ground up and wants to keep weight off the front end without giving up the accuracy Proof barrels are known for. At 2 pounds 7 ounces, it's dramatically lighter than a comparable steel blank, which matters a lot once you're carrying a rifle up a mountain or holding it steady off a bag all day.
This particular blank runs a Sendero contour, which is Proof's go-to profile for builders who want a stiffer barrel without jumping all the way up to a bull weight. It's also their preferred contour if you plan to run a suppressor, since the added stiffness helps support the can and keeps harmonics more consistent whether you're shooting suppressed or not. Underneath the carbon wrap sits a 416R stainless steel core, so the chamber area, threads, and muzzle are still solid steel where a gunsmith needs it to be. The 2.5 inch breech and 1.20 inch shank line up with the common footprint most custom bolt actions are machined around.
What sets this barrel apart from Proof's older carbon fiber lineup is the rifling itself. PXT, short for Proof Exponential Twist, eases the bullet into rotation at a much shallower angle instead of shocking it into a spin right out of the chamber. That softer engagement lowers engraving force and slows throat erosion, and Proof has documented real gains in barrel life from the design. The 1 in 7.5 twist on this blank sits right in the sweet spot for 6.5mm, stable enough for heavier match bullets in the 147 to 156 grain range while still handling lighter hunting weights without issue.
Keep in mind this is a blank, not a finished barrel. It still needs to be chambered, threaded, and crowned by a gunsmith and fitted to your specific action before it goes on a rifle. That's standard for a barrel at this level, and it actually works in your favor since you get to spec the exact chamber and thread pattern your build calls for instead of settling for a one-size-fits-all fit.
No, this is an unchambered blank. The bore is already rifled, lapped, and inspected, but it still needs a qualified gunsmith to chamber, thread, crown, and fit it to your specific action before it goes on a rifle.
With a 2.5 inch breech length and 1.20 inch shank diameter, this blank is built around the common footprint used by most custom bolt actions, including Remington 700 pattern receivers. A gunsmith will confirm exact fitment and machine it to your action's specific tolerances.
This bore size covers popular 6.5mm cartridges like 6.5 Creedmoor, 6.5 PRC, and .260 Remington, among others. The 1:7.5 PXT twist handles heavier match bullets in the 147 to 156 grain range very well while still shooting lighter hunting bullets just fine.
The carbon fiber wraps around a 416R stainless steel core, so you get the strength and heat handling of steel with a lot less weight hanging off the front of your rifle. It also cools faster between strings than steel and doesn't require any special maintenance beyond normal bore care.
| UPC | 843068152294 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 152294 |
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