Underwood Ammo 297 10mm 180gr Full Metal Jacket 50 Per

The Xtreme Defender is based on the popular Xtreme Penetrator product line. The XD ammunition has an optimized nose flute, total weight, and velocity to achieve a penetration depth up to 18 inches with a permanent wound cavity (PWC) that is just simply enormous. Not only is the PWC over 100% larger than any other expanding bullet, expansion is achieved despite being shot through barriers.