Cartridge : 250 grain Americast Bullets hard cast lead flatpoint. Firearm : Recoil-operated handgun with 5.0" barrel length. Calibration : 11.7 ± 0.05cm and 618 ± 0.500 ft/sec impact velocity. Cartridge consisted of 5.0gr of AA#2 with CCISPP. COAL was 1.250". Shot impacted the block at 827 ± 0.500 ft/sec, penetrated 16.0 ± 0.031" of gelatin and through ~10" of polyester-filled bullet arresting box. Projectile was not recovered, but appearance of wound track illustrates that minimal expansion took place.