Cartridge : .45ACP Speer Gold Dot 200gr +P (Load # 23969) Firearm : Recoil-operated semi-auto with 3.8" barrel length. Calibration : '591' ± 0.500 ft/sec at 8.7 ± 0.05cm BB penetration. Velocities not recorded due to failing light (chronograph malfunctioned on calibration shot). Shot 1 penetrated to 12.3 ± 0.031” and expanded to 0.668 ± 0.0005” Shot 2 penetrated to 12.4 ± 0.031” and expanded to 0.665 ± 0.0005” Shot 3 penetrated to 12.1 ± 0.031” and expanded to 0.659 ± 0.0005” Shot 4 penetrated to 12.3 ± 0.031” and expanded to 0.667 ± 0.0005” Shot 5 penetrated to 13.0 ± 0.031” and expanded to 0.661 ± 0.0005”