Proof Research 264 Caliber Barrel Blank, 1:8 Twist, Stainless Steel

If you're building a precision rifle in .264 caliber and want a barrel blank that arrives ready for your gunsmith's finishing work, the Proof Research 264 Caliber Barrel Blank with 1:8 twist offers the foundation serious long-range shooters demand. Proof Research barrels are manufactured in-house using 416R stainless steel—a material engineered specifically for precision rifle barrels. This blank comes double stress-relieved and ready for threading and chambering, so your gunsmith can complete the build to your exact specifications.

The 416R stainless steel at the heart of this barrel blank is the industry standard for match-grade work. It delivers the homogeneous microstructure that ensures uniform hardness along the barrel's length, critical for consistent rifling and bore accuracy. The material machines cleanly for precise bore drilling and reaming, and polishes uniformly for hand lapping—both essential steps in building a barrel capable of tight groups at distance. 416R also balances high tensile strength with the toughness needed to handle chamber pressures shot after shot without degradation.

This is a gunsmith-finished product, not a complete barrel ready to install. You'll work with a qualified gunsmith to thread the muzzle, chamber it to your cartridge, and finish any contour work to match your build. Because Proof Research drills, contours, reams, and hand laps each barrel individually before inspection, you're starting with a precision blank that reflects over 15 years of Lawrence Barrels' manufacturing heritage, now under Proof's own roof.

The 1:8 twist rate suits the .264 caliber and stabilizes the bullet weights commonly loaded in this cartridge. Whether you're assembling a custom hunting rifle, a long-range precision gun, or a competition build, a Proof Research blank gives you the quality steel and meticulous prep work that separate good builds from great ones.

Key Features

• 416R stainless steel, double stress-relieved for consistency and durability
• Drilled, contoured, and reamed in-house with precision engineering
• Hand lapped and individually inspected via bore scope before shipment
• 1:8 twist rate optimized for .264 caliber
• Gunsmith-finished blank—ready for threading and chambering
• Homogeneous microstructure ensures uniform hardness and rifling accuracy

Specifications

Caliber	.264
Twist Rate	1:8
Material	416R Stainless Steel, Double Stress-Relieved
Condition	Barrel Blank—Requires Gunsmith Finishing (Threading & Chambering)
Inspection	Hand Lapped, Bore Scope Inspected

Frequently Asked Questions

What does "barrel blank" mean—is this ready to install?

No. This is a precision blank that has been drilled, contoured, reamed, rifled, and lapped, but it still requires gunsmith work to complete. Your gunsmith will thread the muzzle end, chamber it to your chosen cartridge, and finish any contour work. It's the foundation of a custom build, not a plug-and-play part.

What calibers and twist rates does this blank support?

This specific blank is chambered for .264 caliber with a 1:8 twist rate. Proof Research manufactures blanks in a range of calibers and twists; check the product listing to confirm this is the caliber and twist you need for your build.

Why 416R stainless steel?

416R was engineered by metallurgists in collaboration with barrel makers and rifle manufacturers to provide the consistency and quality precision barrels demand. It machines cleanly for accurate bore drilling, polishes uniformly for hand lapping, and delivers the balance of strength and toughness required for match-grade performance across typical chamber pressures.

How is this barrel inspected before I receive it?

Each blank is hand lapped and individually inspected using a bore scope to verify bore quality and integrity before shipment. This ensures you're starting with a precision blank ready for your gunsmith's finishing work.