Cartridge : Aguila Sniper SubSonic 60 grain lead round nose Firearm : Ruger 10/22 rifle with 18.5" barrel length. Calibration : All depths corrected (From 10.0 ± 0.05cm @ 587 ± 0.500 ft/sec impact velocity). Penetrated the block head-on until ~ 3.7" when the bullet flipped unto its side. At this point the maximum permanent cavity was 0.5" until ~ 6.7" penetration depth, when the bullet turned either point-forward or base-forward and exited the back of the block at 16.0" penetration depth. Bullet was not recovered.