The Xtreme Defender is the pinnacle of ammunition innovation, building on the renowned Xtreme Penetrator line with enhanced performance and reliability. Engineered for unparalleled stopping power, this ammunition features an optimized nose flute, weight and velocity, allowing it to achieve a penetration depth of up to 18 inches. The result is a Permanent Wound Cavity (PWC) that is exceptionally large over 100% greater than any other expanding hollowpoint on the market. This immense PWC ensures that no other expanding bullet can match its diameter and volume. Designed to perform even through barriers, the Xtreme Defender's solid copper construction makes it impervious to interference from wallboard, sheet metal and automotive glass. This robustness guarantees consistent and effective performance, maintaining its devastating impact regardless of obstacles. As with all Underwood Ammo offerings, the Xtreme Defender utilizes flash suppressed powder to prevent vision impairment in low-light conditions, ensuring clear sightlines when it matters most. Every round is meticulously tested using state-of-the-art equipment and real-world firearms to ensure reliability and consistency. This new production ammunition is non-corrosive, boxer primed and reloadable, packaged in premium brass cases for enduring performance.