Proof Research 264 Cal 28" M24 Contour Bolt Action Barrel Blank, 1:8 Twist, 4 Grooves, Stainless Steel

A Proof Research 264 caliber 28" M24 contour bolt action barrel blank in stainless steel gives you a precision foundation for a custom rifle build. This is a gunsmith-ready blank—you'll handle the threading and chambering—but it arrives from the factory with the rifling, lapping, and bore inspection already complete. If you're building a long-range 264 magnum or similar wildcat on a short-action platform, starting with a finished Proof Research barrel blank cuts months off your project timeline and removes the guesswork from bore concentricity.

Proof Research has been making precision barrels since their 2012 acquisition of Lawrence Barrels' 15-year legacy. They machine their own stainless steel in-house using 416R—a chromium stainless specifically engineered for match-grade barrels. 416R machines cleanly for accurate bore drilling and rifling, polishes uniformly for consistent bore quality, and offers the tensile strength and toughness needed for magnum pressures. Every blank is hand-lapped after rifling and individually inspected with a bore scope before it ships.

The 1:8 twist rate and four-groove profile are fixed; confirm compatibility with your intended load and bullet weight before ordering. This is a blank, so you'll need a competent gunsmith to thread the breech end, cut the chamber, and install your barrel in the action. If you're working with a gunsmith who has a specific setup or headspace requirement, coordinate those details before purchasing.

Key Features

• Double stress-relieved 416R stainless steel for uniform hardness and dimensional consistency
• Hand-lapped bore and individual bore scope inspection for accuracy
• 1:8 twist, four-groove rifling optimized for the 264 caliber
• 28" M24 profile contour balances stiffness and weight for hunting or precision rifle builds
• Gunsmith-ready: rifling and inspection complete; requires threading and chambering by your gunsmith

Specifications

Frequently Asked Questions

What does "barrel blank" mean—is it finished or unfinished?

This blank comes rifled, hand-lapped, and bore-inspected from Proof Research. You do not need to have it rifled. Your gunsmith will thread the breech end and cut the chamber to your specifications.

What twist rate is this, and what bullets will it stabilize?

The twist rate is 1:8. Confirm with your gunsmith and load data that this twist is appropriate for the bullet weights you plan to use in your 264 cartridge.

Can I use this barrel for a long-range hunting rifle?

Yes, the 264 caliber and 28" length suit long-range hunting builds. The 1:8 twist and M24 contour profile support precision shooting. Discuss your specific cartridge choice and load plans with your gunsmith before committing.

What gunsmith work is required to finish this barrel?

Your gunsmith will need to thread the breech end for your action, cut the chamber to your chosen 264 cartridge, and install the barrel in your rifle action. They may also need to fit a muzzle brake or cut threads at the muzzle, depending on your build.