With our bolt-action barrel blanks, the possibilities for chambering in your preferred caliber are virtually endless, while also accommodating a wide range of actions. These barrels come in various calibers, lengths, contours and twist rates to suit your needs. Upon arrival, your barrel will be ready for thread and chamber work by your gunsmith. This is particularly beneficial for wildcat cartridges, which often lack standardized chamber designs or pressure limits. PROOF RESEARCH barrels are built to meet SAAMI and CIP pressure standards, ensuring safe operation with most known cartridges. If you have any questions about your rifle build, feel free to reach out to our customer service team. Exhibits exceptional durability with superior erosion resistance and corrosion protection The material exhibits exceptional pressure resistance, characterized by an optimal blend of high-tensile strength and necessary toughness to endure the extreme chamber pressures experienced during firing Barrel twist rate - 1:8 Shank diameter - 1.20 inches