Special thanks to GM of Jacksonville, FL for funding this test in full. Cartridge : D&S Manufacturing 123gr Hornady V-Max Firearm : 7.62x39mm AR15 with 20" barrel length Block Calibration : 11.0cm @ 596 ft/sec (No correction attempted due to fragmentation) Single shot fired to the center/top of the 10x10x16" gelatin block. Impacted at unrecorded velocity (chronograph malfunctioned). Penetrated to 11.9", with severe fragmentation along the entire penetration track. Bullet core recovered at 0.609" average diameter.