Cartridges : CCI Blazer and Sellier and Bellot FMJ Firearm : Beretta 21a pistol with 2.4" barrel. Calibration : 10.0 ± 0.05cm and 587 ± 0.500 ft/sec impact velocity. Impact velocities were not taken of the bullets, due to the indoor lighting present at the test area. The block was calibrated 1 hour prior to the test (in the outdoors) and returned to quasi-steady thermal equilibrium in a refrigerated space prior to the firearm test event. Velocities and performance obtained should be typical of .25ACP pocket pistols. Shot 1 - Sellier and Bellot 50 grain FMJ. Penetrated to 13.3", no expansion present. Outlined in yellow on the photo. Shot 2 - CCI Blazer 50 grain FMJ. Penetrated to 16" and exited the back of the block. Bullet was not recovered.