"Test Three - Steel - Two pieces of 20 gauge, hot-rolled steel with a galvanized finish are set three inches apart. The clothing covered gelatin block is placed 18 inches behind the rear most piece of steel. This test event simulates the weakest part of a car door." Not having access to the above steel, I went with 2 sheets of thicker, 18 gauge cold-rolled sheet. The light clothing on the block consisted of two layers of 12 oz. denim fabric. Round tested was Federal Premium 3-inch magnum 00 copper-plated buckshot. Firearm was 20" barrel pump action with cylinder choke. Block calibrated at 9.9cm and 608 ft/sec BB velocity. Single shot fired to the center of the first sheet of steel. Impact velocity was unrecorded due to chronograph malfunction. Maximum pellet penetration was 9.25". 7 out of 15 pellets recovered in block, two were found in the space between the two sheets. The remaining 6 apparently headed to the place where socks vanish to when placed in the dryer - these 6 pellets were unrecovered.