Special thanks to J.K. for sponsoring this test in full. Cartridge : Federal 165gr and 230gr Hydra-Shok JHP Firearm : Mass-delayed rifle with 16.6" barrel length Block calibration : All depths corrected (From 9.9cm @ 585 ft/sec) The gelatin block was faced with 4 layers of 14.1 ounce denim fabric, to simulate the stresses of penetrating heavy winter clothing. Shot 1 - 165gr Hydra-Shok. Impacted at 1214 ft/sec, penetrated to 9.5" and was recovered at 0.786" average diameter and 156.2gr weight. Shot 2 - 230gr Hydra-Shok. Impacted at 992 ft/sec, penetrated to 13.4" and was recovered at 0.716" average diameter and 226.0gr weight.