{"product_id":"proof-research-103340-224-16-5-1-8-twist-carbon-fiber-sendero-bolt-action-barrel-blank","title":"Proof Research 103340 .224 16.5\" 1:8 Twist Carbon Fiber Sendero Bolt Action Barrel Blank","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eProof Research 103340\u003c\/span\u003e\u003c\/strong\u003e is a \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e.224\u003c\/span\u003e\u003c\/strong\u003e bolt-action \u003cstrong\u003ebarrel blank\u003c\/strong\u003e cut to a \u003cstrong\u003e16.5\" length\u003c\/strong\u003e in Proof Research's heavy \u003cstrong\u003eSendero\u003c\/strong\u003e contour and built around their signature carbon-fiber-wrapped \u003cstrong\u003e416R stainless steel\u003c\/strong\u003e core.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis blank is intended for the custom rifle builder who wants to take advantage of Proof Research's premium \u003cstrong\u003e.224\u003c\/strong\u003e barrel platform. The \u003cstrong\u003e1:8\" twist\u003c\/strong\u003e is well suited to stabilizing a wide range of heavy, high-BC \u003cstrong\u003e.224\u003c\/strong\u003e projectiles for long-range and varmint applications. A \u003cstrong\u003e2.5\" barrel breech\u003c\/strong\u003e and \u003cstrong\u003e1.20\" shank diameter\u003c\/strong\u003e give the blank a robust, target-grade profile for precision bolt-action builds.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eProof Research's carbon-fiber-wrapped barrels start with a stress-relieved \u003cstrong\u003e416R stainless steel\u003c\/strong\u003e core that is fully encapsulated in high-modulus aerospace-grade \u003cstrong\u003ecarbon fiber\u003c\/strong\u003e along the bore. The carbon fiber wrap reduces overall weight, shifts the rifle's balance point rearward over the receiver, and pulls heat away from the bore faster than an equivalent all-steel barrel. In this \u003cstrong\u003eSendero\u003c\/strong\u003e contour the blank weighs approximately \u003cstrong\u003e2 lbs 8 oz\u003c\/strong\u003e, delivering match-grade accuracy potential once chambered, threaded, and finished.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis listing is for the \u003cstrong\u003ebarrel blank only\u003c\/strong\u003e - no muzzle threads, chambering, or crown work has been performed. The blank will need to be drilled (if required for your action), reamed, chambered in your chosen \u003cstrong\u003e.224\u003c\/strong\u003e cartridge, threaded, and crowned by a qualified gunsmith before installation. Made in the \u003cstrong\u003eUSA\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":55077088592194,"sku":"195861","price":852.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_3ee477ed-521e-4b48-972f-c2365e7bbb54.png?v=1784757257","url":"https:\/\/centerfiresystems.com\/products\/proof-research-103340-224-16-5-1-8-twist-carbon-fiber-sendero-bolt-action-barrel-blank","provider":"Centerfire Systems","version":"1.0","type":"link"}