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Proof Research earned its name in the barrel world, and this .264 caliber blank is a great look at why. It starts life as double stress-relieved 416R stainless steel, a pre-hardened chromium alloy that machines clean, holds a uniform hardness end to end, and stands up to the kind of chamber pressure a fast 6.5mm cartridge throws at it. The Medium Sporter contour keeps things reasonable on the scale, so you get real precision-barrel manufacturing without hauling around a full bull-barrel profile. At 28 inches with a 1:8 twist, it's set up to stabilize the heavier, high-BC 6.5mm bullets that long-range folks reach for.
Proof runs the same process on their steel barrels as they do on their carbon fiber line. Each blank is drilled, contoured, and reamed to bore diameter, then single-point cut rifled and hand lapped for a smooth, consistent bore. Every one gets a trip past the borescope and multiple quality checkpoints before it ships. That attention is what gives these barrels their reputation for shot-to-shot consistency and a long, usable life.
This is a blank, not a drop-in pre-fit, and that's the whole point. It arrives ready for a qualified gunsmith to thread, chamber, and crown to your action and your cartridge of choice. That flexibility is why builders like starting with a Proof blank: the 6.5mm bore opens the door to a whole family of chamberings, and you get to spec the finished barrel exactly how you want it. Match it to a solid action and a barrel job you trust, and you've got the foundation for a rifle that punches well above its contour.
Bottom line, if you're piecing together a 6.5mm precision or hunting build and want a name that shows up in winners' circles, this Medium Sporter blank is a smart place to start.
No, this is a barrel blank, not a finished pre-fit. It ships ready for a qualified gunsmith to thread, chamber, and crown it to your action and cartridge. Plan on gunsmith work before it's ready to install and fire.
The .264 bore covers the full 6.5mm family, so your gunsmith can chamber it for popular options like 6.5 Creedmoor, 6.5 PRC, 6.5-284, and others. The 1:8 twist is well suited to the heavier, high-BC 6.5mm bullets favored for long range. Talk with your gunsmith about the best match for your intended cartridge and action.
Medium Sporter is a mid-weight profile that splits the difference between a slim hunting barrel and a heavy competition bull barrel. It keeps overall rifle weight manageable while still giving you the stiffness and heat capacity that help with consistent groups. It's a solid pick for a do-it-all precision or hunting rifle.
Proof single-point cut rifles these barrels, then hand laps them and inspects each one with a borescope. Cut rifling is known for producing minimal stress in the bore, which helps with accuracy and longevity. The 416R stainless is double stress-relieved for consistent hardness along the whole length.
| UPC | 843068101100 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 101100 |
| Length | 28'' |
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