Underwood Ammo 232 Xtp 10Mm 155Gr Jacketed Hollow Point 20 Per Box/10 Case
The Underwood Ammo 232 XTP 10mm ammunition delivers serious stopping power for self-defense and hunting applications. Built on nickel-plated brass cases that are reloadable and non-corrosive, these 155-grain jacketed hollow points are designed to perform when it matters most. Each round exits the muzzle at 1500 feet per second with 775 foot-pounds of energy, making it a potent choice for 10mm shooters who demand reliable, purpose-built ammunition.
What sets this load apart is its purposeful engineering across multiple disciplines. The 155-grain XTP bullet is a proven design that expands reliably on impact while maintaining the penetration needed for effective terminal performance. The nickel-plated brass casings resist corrosion and provide the durability needed for serious shooters who reload. This ammo runs supersonic, so it's also safe for use in suppressed 10mm firearms if that's part of your setup.
Underwood Ammo manufactures this ammunition to strict tolerances, and it's loaded fresh as new production. Whether you're training for defensive proficiency, hunting medium game, or stocking reliable 10mm for your go-to sidearm, these rounds deliver consistent performance. Each box contains 20 rounds, and cases are available in 10-box quantities for shooters who want to stock up.
Key Features
- 155-grain XTP hollow point bullets designed for expansion and controlled penetration
- Nickel-plated brass cases—reloadable and corrosion-resistant
- New production, non-corrosive boxer-primed ammunition
- 1500 feet per second muzzle velocity with 775 foot-pounds of energy
- Supersonic load safe for use in suppressed 10mm firearms
- Proven performance for self-defense and hunting applications
Specifications
| Caliber | 10mm Auto |
| Bullet Weight | 155 grains |
| Bullet Type | Jacketed Hollow Point (XTP) |
| Bullet Diameter | 0.40 inch |
| Case Material | Nickel-Plated Brass |
| Case Type | Reloadable Boxer Primed |
| Muzzle Velocity | 1500 feet per second |
| Muzzle Energy | 775 foot-pounds |
| Ballistic Coefficient (G1) | 0.137 |
| Sectional Density | 0.138 |
| Rounds Per Box | 20 |
| Corrosive | No |
| Suppressor Safe | Yes |
| Manufacturer | Underwood Ammo |
Frequently Asked Questions
Can I use Underwood 10mm in a suppressed firearm?
Yes. This ammunition is rated safe for use in suppressors and runs supersonic, so it will still produce a report even when suppressed.
Are these cases reloadable?
Yes. The nickel-plated brass cases are reloadable, which makes this a good choice for shooters who reload their own ammunition.
What is this ammo designed for—hunting or self-defense?
Underwood engineered these rounds for both applications. The 155-grain XTP hollow point is proven for self-defense and is also effective for hunting medium game with a 10mm.
How many rounds come in each box?
Each box contains 20 loaded rounds. The product is sold in cases of 10 boxes, giving you 200 total rounds per case.

