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This is the barrel blank a lot of precision builders reach for when they want to cut weight without giving up accuracy. Proof Research takes a match-grade 416 stainless core, turns it down to a slimmer profile, then wraps it in aerospace-grade carbon fiber set in their own proprietary resin. The result in this configuration is a .224 caliber, 20-inch Sendero contour blank with a 1:7 twist, ready to be chambered for cartridges like .223 Rem, .22-250, .220 Swift, and similar rounds in the family.
The carbon wrap is the whole point. It runs far lighter than a comparable steel contour, and the helical fiber layup helps pull heat out along the length of the barrel instead of trapping it. That translates to a barrel that cools faster and holds its point of impact through longer sessions at the bench or in a match. You also get the added stiffness carbon fiber lends, which helps tame harmonic vibration. The 1:7 twist is on the fast side, so it favors heavier, longer .224 projectiles that reward a good stabilizing spin at distance.
Keep in mind this ships as a true blank. It arrives drilled, rifled, contoured, and inspected, but the chambering, threading, crowning, and final fitting are all left to your gunsmith. That is exactly why builders like blanks in the first place. They give you total say over shank fit, chamber spec, and how the barrel mates to your specific action, including factory Remington 700s that don't take a universal pre-fit. The Sendero contour carries a 2.5-inch breech length and a 1.20-inch shank diameter, which is the standard on these blanks unless noted otherwise.
If you're spec'ing out a lightweight long-range rig, a mountain hunting build, or a custom precision gun, this is a proven foundation to start from.
This is a true barrel blank, so it is not ready to shoot as-is. It comes drilled, rifled, contoured, and inspected, but the chambering, threading, crowning, and fitting to your action all need to be done by a qualified gunsmith. That extra work is what lets you dial in the exact chamber and fit you want.
The .224 bore covers a wide range of popular rounds, including .223 Rem, .22-250 Rem, and .220 Swift. With the fast 1:7 twist, it leans toward heavier, longer .224 bullets that stay stable at distance. Your gunsmith will cut the chamber to whatever cartridge you decide on.
The carbon fiber wrap runs a good bit lighter than a steel barrel of the same contour, which is a big deal on a hunting or long-range build. The fiber also helps move heat out along the barrel so it cools faster and holds accuracy through longer strings of fire. You still get a match-grade stainless core doing the actual shooting.
A factory Remington 700 doesn't take a universal pre-fit barrel because of action-to-action tolerance variance, which is exactly where a blank shines. A gunsmith uses the blank to machine a correct fit for your specific action. The Sendero blank carries a standard 1.20-inch shank and 2.5-inch breech length to work from.
| UPC | 843068103432 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 103432 |
| Barrel Length | 20" |
| Caliber/Gauge | .224 Caliber |
| Length | 20'' |
| Product Type | Accessory-Barrels |
| Shipping Weight | 0.0 |
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