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The Underwood .40 S&W with 155-grain Hornady XTP is built around one of the most trusted hollow point designs in shooting sports. Hornady's eXtreme Terminal Performance bullet comes with a proven track record spanning decades, and Underwood pairs it with their own carefully developed powder charges and primers for consistent, powerful rounds.
The 155-grain XTP was engineered for expansion across a range of velocities, which matters if your handgun doesn't chrono exactly like factory specs suggest. The bullet features six precision serrations that divide it into symmetrical sections, strategically weakening the jacket to initiate controlled expansion even at lower impact velocities. Inside, a swaged lead core pairs with a drawn copper jacket to ensure uniform expansion and in-flight stability. Each XTP also has a cannelure that locks the core and jacket together, adding security under the high pressures these rounds develop.
The nickel-plated brass cases deliver several practical benefits beyond looks. They feed more reliably across different firearm actions, resist corrosion better than traditional brass during storage or when exposed to moisture and leather, and clean up easier if you're into reloading. All Underwood XTP rounds use flash-suppressed powder formulas, so your night vision won't wash out if you need to fire in low light.
You're getting 1,300 feet per second of muzzle velocity and 582 foot-pounds of energy from these 155-grain pills. The ammunition is new production, boxer-primed, and fully reloadable. The round is supersonic and delivers the kind of ballistic performance that makes the .40 S&W an effective choice for both hunting and self-defense use.
The 155-grain XTP achieves higher muzzle velocity (1,300 fps) than heavier loadings, which promotes better expansion performance in hollow point designs. This lighter bullet weight also generates less recoil, allowing faster follow-up shots while maintaining the deep penetration and reliable expansion the XTP is known for.
Yes. These are new-production rounds with boxer-primed, nickel-plated brass cases that are fully reloadable. The nickel plating actually makes case inspection and cleaning easier during the reloading process compared to standard brass.
Flash-suppressed powder formulations burn more completely and produce less muzzle flash, which prevents your eyes from losing night vision adaptation if you need to fire in low-light conditions. This is particularly valuable for defensive scenarios where you might need to see threats immediately after firing.
The 155-grain load prioritizes velocity and faster expansion, which many prefer for self-defense due to reliable performance across a range of shot distances. The 180-grain loads are heavier, produce less velocity, and are more commonly chosen for target shooting and practice where recoil management matters less.
| Caliber/Gauge | .40 S&W |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 1.40 |
| Grains | 155 gr |
| Manufacturer | |
| Manufacturer Part Number | 223 |
| Shipping Weight | 0.73 |
| Units per Box | 20 |
| UPC | 816874020729 |
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