Underwood Ammo standard Jacketed Hollow Point (JHP) rounds set the benchmark for performance, delivering unmatched reliability, expansion and penetration. Featuring a tapered copper alloy jacket that extends to the rim, these bullets ensure flawless feeding and consistent performance. A form-fitted pure lead core enhances controlled expansion, while our High-Performance Jacket design maximizes stopping power with deep penetration. For superior function, we use nickel-plated brass casings, offering smooth feeding, enhanced corrosion resistance and easy clean-up. Unlike traditional brass, our nickel plating prevents tarnishing, even in storage or exposure to moisture and leather. Additionally, flash-suppressed powder reduces muzzle flash, preserving your vision in low-light situations. As with all Underwood Ammo, these rounds undergo rigorous real-world testing in popular firearms to ensure flawless performance when it matters most. At this time, we do not recommend using our 9mm ammo with True Precision P365 conversion barrels.