12 gauge Winchester Super-X 3" magnum Number 1 unplated buckshot. Firearm was pump shotgun with 20" cylinder bore barrel. Block calibrated at 592 ft/sec and 9.2cm penetration. Single shot was fired at the block, permanent cavity of 6"+ collapsed at 9" depth. Shallowest penetrating projectile was found at 11" depth and the deepest was found at 16"+. Muzzle was at 6 feet distance from the face of the block at the time of firing. Shot dispersion approximated 1" diameter at the entrance to the block and 5.5" diameter at the back of the block. All pellets exhibited moderate deformation with the average diameters equalling 0.300".