The Proof Research 22" Carbon Fiber Sendero Barrel is engineered for precision shooting in 6.5 Creedmoor with a 1:8 twist rate for optimal bullet stabilization.Proof Research Carbon Fiber Sendero Profile Barrel22-inch barrel length for enhanced accuracy6.5 Creedmoor chambering1:8 twist rate for excellent bullet stabilityDrop-in compatibility with Zermatt TL3/SR3 short action receiversLightweight carbon fiber constructionIdeal for precision rifle builds and long-range shooting applications this barrel combines the strength and accuracy of a steel core with the weight savings of carbon fiber construction.