{"product_id":"proof-research-ba-carbon-fiber-barrel-blank-284-cal-18-1-8-twist-sendero-contour-bolt-action","title":"Proof Research BA Carbon Fiber Barrel Blank 284 Cal 18\" 1:8 Twist Sendero Contour - Bolt Action","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eProof Research BA Carbon Fiber Barrel Blank\u003c\/span\u003e\u003c\/strong\u003e in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e284 Cal\u003c\/span\u003e\u003c\/strong\u003e is a precision \u003cstrong\u003ebolt-action\u003c\/strong\u003e rifle barrel blank built for custom long-range and hunting-rifle projects in the \u003cstrong\u003e284 Winchester\u003c\/strong\u003e caliber family. Its double stress-relieved \u003cstrong\u003e416R stainless steel\u003c\/strong\u003e core is wrapped in \u003cstrong\u003ecarbon fiber\u003c\/strong\u003e — Proof Research's signature construction that achieves up to \u003cstrong\u003e64% weight savings\u003c\/strong\u003e over a traditional all-steel barrel of comparable contour while improving cooling and rigidity.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eCut to an \u003cstrong\u003e18\" length\u003c\/strong\u003e with a \u003cstrong\u003e1:8 twist rate\u003c\/strong\u003e to stabilize modern high-BC 7mm \/ .284 projectiles, this blank uses the full \u003cstrong\u003eSendero contour\u003c\/strong\u003e for substantial mass at the muzzle. The \u003cstrong\u003e2.50\" breech length\u003c\/strong\u003e and \u003cstrong\u003e1.20\" shank diameter\u003c\/strong\u003e are sized to drop into a range of bolt-action receiver faces, leaving the gunsmith or builder to finish the chamber, crown, and threads to the final rifle specification. Finished weight on this Sendero blank comes in at approximately \u003cstrong\u003e2 lbs 8 oz\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether the project is a lightweight mountain rifle or a heavy-barreled long-range rig, this \u003cstrong\u003ebarrel blank\u003c\/strong\u003e delivers a precision foundation with the weight advantage of carbon fiber and the proven accuracy of \u003cstrong\u003e416R stainless steel\u003c\/strong\u003e. \u003cstrong\u003eMade in the USA\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"Proof Research","offers":[{"title":"Default Title","offer_id":55473180770626,"sku":"195868","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_af1494d6-9bcc-4d4f-93ea-4dcb23c1247c.png?v=1785487791","url":"https:\/\/centerfiresystems.com\/products\/proof-research-ba-carbon-fiber-barrel-blank-284-cal-18-1-8-twist-sendero-contour-bolt-action","provider":"Centerfire Systems","version":"1.0","type":"link"}