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Underwood 380 ACP Ammo 68 Grain Xtreme Defender - 678
Rated 4.33 out of 5 across over 3 verified reviews and growing, with over 2 five-star reviews and growing, this Underwood Xtreme Defender 380 load pairs a 68 grain solid monolithic bullet with nickel plated brass. Built as a lead-free, boxer-primed 380 ACP ammo option, it is designed for shooters who want Underwood’s Xtreme Defender construction in a compact pistol caliber.
Why Shooters Choose Underwood Ammo 380 ACP
- Xtreme Defender Construction: The solid monolithic bullet uses copper material and a lead-free design, giving this Underwood 380 Xtreme Defender load a purpose-built projectile style.
- Defensive Utility: Underwood describes this load as proven for personal defense, making it a serious option for shooters evaluating 380 ACP ammo for carry-focused use.
- Hunting Use: The manufacturer also identifies this round for hunting applications, supported by its solid monolithic bullet construction and supersonic rating.
- Published Ballistics: Verified specs list 1300 fps muzzle velocity and 255 ft lbs muzzle energy, giving shoppers clear performance data for comparison.
- Nickel Plated Brass: The nickel plated brass case helps identify the load easily and is paired with a Centerfire / Boxer primer system.
- Reloadable Case Design: Underwood lists this as new-production, non-corrosive ammunition with boxer-primed, reloadable brass cases.
- Packaging Options: Available as a Box of 20 or Case of 200, this SKU 678 fits both smaller purchases and case quantity planning.
What is the muzzle velocity of this Underwood Ammo 380 ACP 68 grain Solid Monolithic load?
The verified muzzle velocity is 1300 fps. The verified muzzle energy is 255 ft lbs.
Is this the Underwood Xtreme Defender 380 load?
Yes. This is the Underwood 380 Xtreme Defender load with a 68 grain solid monolithic bullet, listed under SKU 678.
What type of bullet does this 380 ACP ammo use?
It uses a Solid Monolithic bullet made with copper material. Underwood also lists the projectile as lead free.
Is this ammunition intended for personal defense?
Underwood describes this load as proven for personal defense. As with any defensive ammunition, shooters should confirm function and point of impact in their own firearm.
Can this load be used with a suppressor?
Underwood states this load is safe to use in a suppressor. It is also rated supersonic, so shoppers should understand that suppressor-safe and subsonic are not the same thing.
What case and primer does it use?
This load uses a nickel plated brass case with a Centerfire / Boxer primer. Underwood identifies the brass as reloadable and the ammunition as new-production and non-corrosive.
About Underwood Ammo 380 ACP
This Underwood Ammo 380 ACP load is built around a 68 grain solid monolithic copper bullet in a nickel plated brass case. Solid monolithic bullets are made from a single solid material rather than a traditional lead-core design, and they are commonly selected when shooters want a lead-free projectile with a purpose-specific profile.
Underwood states this Xtreme Defender load is new-production, non-corrosive, boxer primed, reloadable, supersonic, and safe to use in a suppressor. In the 380 ACP category, that combination speaks to shooters looking for compact-caliber ammunition with defensive intent, verified ballistic data, and a case design that supports reloading where appropriate.
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| Manufacturer |
Underwood Ammo |
| Caliber |
380 ACP |
| Bullet Type |
Xtreme Defense |
| Grain |
68 |
| Muzzle Velocity |
1400 fps |
| Muzzle Energy |
296 ft lbs |
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| Manufacturer |
Underwood Ammo |
| Caliber |
380 ACP |
| Bullet Type |
Jacketed Hollow Point |
| Grain |
90 |
| Muzzle Velocity |
1200 fps |
| Muzzle Energy |
288 ft lbs |
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| Manufacturer |
Underwood Ammo |
| Caliber |
380 ACP |
| Bullet Type |
Jacketed Hollow Point |
| Grain |
90 |
| Muzzle Velocity |
1025 fps |
| Muzzle Energy |
210 ft lbs |
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| Manufacturer |
Underwood Ammo |
| Caliber |
380 ACP |
| Bullet Type |
Hollow Point |
| Grain |
68 |
| Muzzle Velocity |
1150 fps |
| Muzzle Energy |
200 ft lbs |
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| Manufacturer |
Underwood Ammo |
| Caliber |
380 ACP |
| Bullet Type |
Xtreme Defense |
| Grain |
68 |
| Muzzle Velocity |
1300 fps |
| Muzzle Energy |
255 ft lbs |
See Full Product Info
For shooters comparing 380 ACP defensive and hunting loads, this Underwood Ammo option brings Xtreme Defender construction, lead-free materials, and verified ballistic specs into a compact-caliber package. Choose a box for testing or a case quantity when planning bulk ammo for your Underwood Ammo lineup.
| Field | Details |
| MPN | 678 |
| UPC | 816874023683 |
| Manufacturer | Underwood |
| Platform | Handgun |
| Ammo Application | Personal Defense |
| Ammo Type | Solid Monolithic |
| Caliber | 380 ACP |
| Grain Weight | 68 |
| Quantity Per Package | Box of 20 / Case of 200 |
| Test Barrel Length | Not Provided |
| Muzzle Velocity | 1300 fps |
| Muzzle Energy | 255 ft lbs |
| Ballistic Coefficient (G1) | Not Provided |
| Case Type | Nickel Plated Brass |
| Primer Type | Centerfire / Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead Free | Yes |
| Staked Primer | Not Provided |
| Country of Origin | USA |
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