The Proof Research 113707 Bolt Action Barrel Blank 243 Cal 28" Competition Contour 1:7.50" Twist 4 Grooves in Stainless delivers a precision-focused foundation for high-performance bolt-action builds. Crafted with a rifled stainless bore and a 28" blank length, this barrel features a competition contour and a 1:7.50" twist that promote stability and uniform projectile rotation for improved accuracy across extended ranges. The four-groove rifling enhances edge formation and gas seal, contributing to consistent muzzle velocity and clean bore performance through repetitive use. Designed for rifle enthusiasts and professional builds alike, this barrel blank integrates seamlessly into bolt-action platforms seeking long-range capability and dependable shot strings. With its stainless finish and robust construction, it resists corrosion while maintaining dimensional integrity under demanding field and range conditions. Ideal for precision rifle projects, this Proof Research component supports meticulous chambering and harmonizes with high-grade barrels to achieve tight groupings and repeatable accuracy. Whether upgrading an existing build or starting a new project, it represents a reliable choice for shooters pursuing precise, repeatable performance in a 243 caliber platform.