Cartridge : Various .40S&W bullets. Firearm : Recoil-operated handgun with 4.6" barrel length. Calibration 9.3 ± 0.05cm at 590 ft/sec (velocity estimated) Bullet impact velocities not taken due to failing light at test area. Bullets are photographed as listed, from left to right. 165gr. Remington factory Golden Saber Penetrated 11.7 ± 0.031” Expanded to 0.694 ± 0.0005” average diameter. 165gr. Cor-Bon JHP Penetrated 14.4 ± 0.031” , Fragmented bullet shards apparantly traveled along the wound channel periphary for the entire length of penetration – largely exacerbating the effects of the bullets small measured diameter. Jacket delaminated from core. Expanded to 0.502 ± 0.0005” average core diameter. 155gr. Winchester Ranger (RA40155HP) Penetrated 9.8 ± 0.031” Expanded to 0.72 ± 0.0005” average diameter. Jacket delaminated from core.