Firearm : US M-1 Carbine with 18" barrel length Ammunition : 110gr M1 FMJ (Lake City 1952 headstamp) Block calibration : 10.6cm @ 597 ft/sec Shot fired from a distance of 10' between the muzzle face and the front face of the rifle-size gelatin block. Impacted at 1910 ft/sec, penetrated to 16.3" and exited the rear face of the block. Bullet began to yaw at 4.0" penetration and righted itself (apparently continued on in nose-forward orientation) at 11.9". This action of the bullet created significant wounding potential, as may be evident in the picture above. Bullet was recovered undeformed, at unknown depth in a polyester bullet arresting box. Please note that the damage to the upper portion of the block happened sometime during removal from the mold. It was not an effect of a bullet penetration.