Underwood Ammo 850Underwood Ammo 850 Xtreme Defense 32ACP 55gr Solid Monolithic 20 Per Box/10 Case
Underwood Ammo 850 Xtreme Defense 32 ACP ammunition delivers a modern defensive load engineered for handgun carriers who prioritize stopping power and reliability in a compact caliber. This 55-grain solid monolithic copper round combines ballistic efficiency with subsonic velocity—clocking in at 950 feet per second—making it a sound choice for suppressed firearms, close-quarters defense, and shooters seeking a lead-free option. Each box contains 20 rounds of new production ammunition ready to load into your 32 ACP handgun.
The solid copper bullet design eliminates lead, addressing both environmental and range concerns while maintaining the sectional density and penetration characteristics needed for defensive work. Loaded in nickel-plated brass with boxer primers, these rounds are reloadable, giving you the option to stretch your investment over multiple range sessions. The subsonic profile keeps velocities controlled—ideal if you're running a suppressor or simply prefer the ballistic behavior of slower-moving projectiles in a defensive context.
Underwood's reputation for quality handgun ammunition shows in the attention to detail here: the monolithic construction resists fragmentation, the non-corrosive formulation keeps your firearm clean, and the muzzle energy of 110 foot-pounds delivers consistent terminal performance at defensive distances. This is ammunition built for shooters who understand that 32 ACP remains a viable self-defense round when you start with serious, purpose-built ammunition rather than century-old surplus or commercial plinking loads.
Key Features
- Solid monolithic copper bullet—lead-free construction
- Subsonic velocity (950 fps) safe for suppressed firearms
- New production, non-corrosive, boxer-primed brass—reloadable
- Nickel-plated case for corrosion resistance and smooth feeding
- Designed for self-defense and hunting applications
- 110 ft-lbs muzzle energy at defensive distances
Specifications
| Caliber | .32 ACP |
| Bullet Weight | 55 grains |
| Bullet Material | Copper (solid monolithic) |
| Bullet Diameter | .3125" |
| Muzzle Velocity | 950 fps |
| Muzzle Energy | 110 ft-lbs |
| Ballistic Coefficient (G1) | .091 |
| Sectional Density | .0805 |
| Case Type | Nickel-plated brass |
| Primer Type | Boxer |
| Reloadable | Yes |
| Lead-Free | Yes |
| Suppressor Safe | Yes |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Manufacturer | Underwood Ammo |
Frequently Asked Questions
Is this ammunition safe to use in a suppressor?
Yes. The subsonic velocity (950 fps) and solid copper bullet design make this round well-suited for suppressed firearms.
Can I reload these cases?
Yes. The ammunition is new production, non-corrosive, and uses boxer primers in reloadable brass cases.
Is this lead-free ammunition?
Yes. The bullet is constructed from solid copper with no lead content, making it suitable for ranges with lead-free requirements and environmentally conscious shooters.
What's the muzzle energy of this load?
The 55-grain bullet exits the barrel at 950 feet per second, delivering 110 foot-pounds of muzzle energy—a solid performance level for a 32 ACP defensive round.

