Proof Research PXT 308 Win 18" Carbon Fiber Barrel Blank

PXT stands for Proof Exponential Twist, the company's rework of conventional rifling geometry and twist progression. Cutting the rifling lead angle and smoothing how the bullet enters the lands lowers engraving force and slows throat erosion. Carbon fiber is how the barrel stays light.

This one is a carbon fiber blank in a Sendero contour, 18" long and bored for 308 for a bolt gun. A blank goes to your smith to be chambered and fit to the action, so you get to pick the chamber and the shoulder that match how you load.