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Underwood 45 ACP +P Ammo 135 Grain Xtreme Defender - 844
Rated 5 out of 5 across over 1 verified reviews and growing, with over 1 5-star rating, Underwood 45 ACP +P Ammo 135 Grain Xtreme Defender - 844 centers on a 135 grain Solid Monolithic bullet at 1335 fps. This Underwood Ammo 45 ACP load uses a nickel plated brass case, Centerfire Boxer primer, and an Xtreme Defender design for shooters who want a lead-free defensive cartridge with +P pressure.
Why Shooters Choose Underwood Ammo 45 ACP
- Xtreme Defender design: Underwood describes this bullet style as using an optimized nose flute, total weight, and velocity to support deep penetration and a permanent wound cavity.
- Solid monolithic construction: The 135 grain bullet is a solid monolithic copper design, giving shooters a lead-free option rather than a traditional lead-core projectile.
- +P 45 ACP load: The +P designation indicates a higher-pressure 45 ACP cartridge, so it is intended for firearms rated for +P ammunition.
- Nickel plated brass case: The verified case material is nickel plated brass, a common choice for corrosion resistance and easy cartridge visibility.
- Boxer-primed and reloadable: Underwood lists this ammunition as new production, non-corrosive, Boxer-primed, and reloadable brass-cased.
- Suppressor safe: Manufacturer-stated features list this load as suppressor safe, while firearm and suppressor compatibility should still be confirmed by the shooter.
- Case option available: Packaging is listed as a Box of 20 or Case of 200, giving buyers a choice between a smaller box and a larger case format.
What is the muzzle velocity of Underwood Ammo 45 ACP 135 grain Solid Monolithic?
The verified muzzle velocity is 1335 fps. Muzzle energy is Not Provided in the verified specs for this load.
Is this Underwood 45 ACP Xtreme Defender a +P load?
Yes. This is a 45 ACP +P cartridge, which means it should be used only in firearms rated by the manufacturer for +P ammunition.
What bullet is used in this underwood xtreme defender 45 ACP load?
It uses a 135 grain Solid Monolithic copper bullet. Underwood lists it as lead free, and the Xtreme Defender design uses an optimized nose flute rather than a conventional expanding hollow point.
Is the brass reloadable?
Underwood lists this ammunition as new production, non-corrosive, Boxer-primed, and reloadable brass-cased. The verified case material is nickel plated brass.
How is item 844 packaged?
Packaging is listed as Box of 20 or Case of 200. The case option is useful if you want more of the same Underwood 45 ACP load in a bulk format.
Is this ammunition suppressor safe?
Manufacturer-stated features list this load as suppressor safe. Always confirm that your firearm, barrel, and suppressor are compatible with 45 ACP +P ammunition before use.
About Underwood Ammo 45 ACP
This Underwood Xtreme Defender 45 ACP load pairs a 135 grain solid monolithic copper bullet with nickel plated brass and a Centerfire Boxer primer. The Xtreme Defender line is based on Underwood’s Xtreme Penetrator concept, with the bullet’s nose geometry, weight, and speed selected to support defensive terminal effect.
For 45 ACP ammo shoppers, this is a +P cartridge, so firearm compatibility matters. Solid monolithic bullets are generally valued for lead-free construction and consistent material integrity, and Underwood states this load is non-corrosive, reloadable, and suppressor safe.
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For shoppers comparing 45 ACP ammo, Underwood Ammo offers this Xtreme Defender load as a lead-free, nickel-plated option in its handgun lineup. Choose the box for a smaller order, or consider the case option when you want bulk ammo for carry-gun function checks, training rotation, or range-bag supply.
| Field | Details |
| MPN | 844 |
| UPC | 816874020187 |
| Manufacturer | Underwood |
| Platform | Handgun |
| Ammo Application | Personal Defense |
| Ammo Type | Solid Monolithic |
| Caliber | 45 ACP |
| Grain Weight | 135 |
| Quantity Per Package | Box of 20 / Case of 200 |
| Test Barrel Length | Not Provided |
| Muzzle Velocity | 1335 fps |
| Muzzle Energy | Not Provided |
| Ballistic Coefficient (G1) | Not Provided |
| Case Type | Nickel Plated Brass |
| Primer Type | Centerfire / Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead Free | No |
| Staked Primer | Not Provided |
| Country of Origin | USA |
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