Penetration = 16.0 ± 0.031" + (20 pellets recovered, remainder exited sides of block) Average penetration (estimate) = 14.8 ± 0.031" Impact velocity = 1072 ± 0.500 feet/second Block calibration, front block, BB velocity = 601 ± 0.500 feet/second Block calibration, front block, BB penetration = 8.4 ± 0.05cm Block calibration, rear block, BB velocity = 569 ± 0.500 feet/second Block calibration, rear block, BB penetration = 8.9 ± 0.05cm Shots fired at 2 ± 0.5 feet from the block. Front block measured (7x7x5)±0.5" and was nearly split into two pieces by the buckshot. Buffer material found in penetration channel to 10" depth.