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This is Proof Research's PXT bolt-action barrel blank in .264 caliber, cut to 20 inches with a 1:7.5 twist. It ships as a blank, meaning your gunsmith threads and chambers it to fit your action and cartridge of choice. That fast twist and 6.5mm bore make it a natural for high-BC 6.5 projectiles, whether you're building a compact precision rig or a hard-hitting hunting rifle.
What sets this one apart is the rifling. PXT stands for Proof Exponential Twist, and it's a full rethink of how a bullet meets the lands. Instead of shocking the projectile into full rotation in the first quarter inch, the twist starts extremely shallow near the breech and accelerates gradually through the bore. That gentler engagement lowers engraving force by roughly 30 percent, cuts throat erosion, and reduces felt torque when the rifle fires.
Proof backs the technology with real numbers from controlled testing. PXT barrels have shown 30 to 100 percent longer life before accuracy drops off, with the reduced lead angle spreading throat wear across more of the bore rather than hammering the first couple inches. They've also documented 20 to 50 percent tighter groups across different ammo types and lots, and the smoother jump to rifling makes these barrels less fussy about bullet jump and powder charge changes. It's tech that came out of military cannon and small arms work aimed at handling modern high-pressure ammunition.
Because it arrives as a blank, you've got flexibility. The .264 bore opens the door to popular 6.5mm chamberings, and a gunsmith finishes it to standard or wildcat specs depending on your plan. Steel construction keeps things budget-friendly compared to Proof's carbon-wrapped blanks while still carrying the same PXT rifling and the accuracy reputation the company has built over the years. If you want a proven blank to anchor your next 6.5 project, this is a strong place to start.
No, this is a barrel blank, not a finished barrel. It arrives ready for a qualified gunsmith to thread and chamber to match your action and cartridge. Plan on gunsmithing before it's ready for a build.
PXT stands for Proof Exponential Twist, a progressive rifling profile that starts the bullet at a very shallow angle near the breech and accelerates the twist through the bore. That gradual engagement reduces engraving force by around 30 percent and spreads throat wear out, which is where the longer barrel life and tighter groups come from. It's designed to work well with modern high-pressure ammunition.
The .264 bore is 6.5mm, so it pairs naturally with popular 6.5mm chamberings, and the 1:7.5 twist favors heavier high-BC bullets. Since it's a blank, your gunsmith can finish it to standard or wildcat specs depending on your build. Talk through your cartridge choice with your smith to confirm the throat and chamber match your goals.
This blank uses steel construction rather than the carbon-fiber wrap Proof is known for, which typically makes it more affordable. It still carries the same PXT exponential twist rifling and the accuracy standards Proof barrels are built around. The carbon-wrapped versions save weight and shed heat better, while the steel option is a great value for a precision or competition build.
| UPC | 843068152324 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 152324 |
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