The Xtreme Defense(R) (XD) Technology is based on the popular Xtreme Penetrator product line. The design goal was to achieve the same barrier performance and massive permanent wound cavity and reduce the penetration depth to coincide with an individual's personal comfort level. It was a goal we did not meet; it was a goal we blew out of the water. The XD ammunition has an optimized nose flute, total weight, and velocity to achieve a penetration depth range of 18 inches with a permanent wound cavity (PWC) that is just simply enormous; no other expanding hollow point comes close to achieving anywhere near this diameter and volume. Not only is the PWC over 100 percent larger than any other expanding bullet, it is near barrier blind, ignoring wallboard, sheet metal, and automotive glass.