Berger 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 .0003a ^2 total indicated runout that you expect with theirlegendary 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.