We built this bullet extra-rugged to survive the extreme performance conditions of heavy hitting 375 caliber magnum cartridges. Features the unprecedented concentricity of less than .0003″ total indicated runout that you expect with our legendary J4 Jackets. Designed with Hybrid ogive geometry that offers exceptional ballistic performance and a easy day at the reloading bench with an easy tuning during load development. The 375 caliber 410 grain bullet is super consistent–Doppler verified with less than 1% ballistic coefficient variation!