Special thanks to J.K. for funding this test in full. Cartridge : Various .223 Remington cartridges Firearm : American Derringer Model 1 (.223 Remington) with 0.80" effective barrel length Block calibration : 9.3cm @ 595 ft/sec (No corrections performed due to tumbling of bullets) Shot 1 - Handloaded 62gr Barnes Triple Shock. Impacted at 884 ft/sec, tumbled at ~ 0.4" depth and penetrated to 11.4". No expansion occured. Shot 2 - Cor-Bon 53gr DPX. Impacted at 1241 ft/sec, tumbled at ~ 0.3" depth and penetrated to 12.5". No expansion occured. Shot 3 - Federal Premium 60gr Nosler Partition. Impacted at 1153 ft/sec, tumbled at ~ 0.3" depth and penetrated to 12.1". No expansion occured. Track outlined in green. Shot 4 - Federal Premium 40gr Nosler Ballistic Tip. Impacted at 1323 ft/sec, tumbled at ~ 0.4" depth and penetrated to 11.1". The orange polycarbonate tip broke off upon bullet tumbling and the nose of the bullet experienced some compression in the radial direction.