XCaliber Ammunition is a manufacturer of premium match grade ammunition. This 458 SOCOM load consists of a 300 grain JHP which accelerates to 1,850 FPS from a 16″ barrel. Accuracy from our test upper averages 1.6″ groups @ 100 yards from bags. Exceptional terminal performance is achieved at this velocity. This round passes through two layers of leather and 26″ of standard FBI density ballistic gelatin. Please check you local and state laws before ordering! No shipping to CA.