- Details
Elevate your personal defense capabilities with Underwood’s .40 S&W Assured Stopping Power ammunition, where cutting-edge ballistic science meets real-world reliability. Each round combines a precisely engineered 135-grain jacketed hollow point projectile with optimized powder charges to achieve a blistering 1400 fps muzzle velocity. The result is a defense round that delivers controlled expansion, optimal penetration, and devastating terminal performance. Built on nickel-plated brass cases and loaded with premium components, these rounds provide the reliability, accuracy, and stopping power that defensive shooters demand, all while maintaining manageable recoil for faster follow-up shots.
Product Highlights:
| Specifications | |
|---|---|
| Manufacturer | Underwood Ammo |
| Caliber | .40 S&W |
| Bullet Weight | 135 grains |
| Bullet Type | JHP (Jacketed Hollow Point) |
| Bullet Material | Copper Solid |
| Muzzle Velocity | 1400 fps |
| Muzzle Energy | 588 ft-lbs |
| Ballistic Coefficient | .090 |
| Sectional Density | .120 |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Reloadable | Yes |
| Item Number | A220U |
| Manufacturer Part Number | 220 |
Key Features:
The Underwood .40 S&W Assured Stopping Power 135gr JHP Ammo offers impressive performance characteristics that make it an excellent choice for self-defense. Here’s a breakdown of its key features:
Applications & Use Cases:
Pros and Cons:
Pros
- ✔ Assured Stopping Power: Designed for maximum effectiveness in self-defense situations.
- ✔ Jacketed Hollow Point: JHP design offers controlled expansion for optimal terminal performance.
- ✔ Compact Cartridge: .40 S&W caliber provides a good balance of power and capacity in compact firearms.
- ✔ Bonded Construction: Bonded bullet design ensures weight retention and penetration through barriers.
- ✔ Made in the USA: Manufactured by Underwood Ammo, known for high-quality defensive ammunition.
Cons
- ✘ Recoil: The .40 S&W cartridge can produce significant recoil, especially in smaller firearms.
- ✘ Overpenetration Risk: High-performance ammunition may pose a risk of overpenetration in some situations.
- ✘ Limited Capacity: 20 rounds per box may be insufficient for extensive training or practice sessions.
- ✘ Specialized Use: Primarily designed for self-defense, may not be suitable for recreational shooting.
About Underwood Ammo:
Underwood Ammo, founded in 2013, has quickly established itself as a leading manufacturer of high-performance ammunition. Based in Sparta, Illinois, Underwood is known for producing some of the most powerful and reliable ammunition on the market. The company specializes in creating loads that push the limits of ballistic performance, often exceeding the velocities and energies of standard factory ammunition. Underwood’s commitment to quality is evident in their use of premium components and rigorous testing procedures. With a focus on innovation and excellence, Underwood Ammo continues to set new standards in the ammunition industry, providing shooters with options that maximize the potential of their firearms.
Frequently Asked Questions:
Q: What is the bullet weight and type for this Underwood .40 S&W ammunition?
A: This Underwood .40 S&W ammunition features a 135 grain jacketed hollow point (JHP) bullet.
Q: How many rounds are included in each box?
A: Each box contains 20 rounds of ammunition.
Q: Is this ammunition reloadable?
A: Yes, this ammunition is reloadable.
Q: What is the case pack quantity for this product?
A: The case pack quantity is 10 boxes per case.
Q: Is this ammunition serialized?
A: No, this ammunition is not serialized.
Q: What is the bullet construction for this Underwood ammunition?
A: The bullet is constructed as a copper solid, which provides excellent performance and expansion.
Q: What are the dimensions of the ammunition box?
A: The box dimensions are 1.45 inches (height) x 2.65 inches (width) x 3.10 inches (length).
Q: What is the muzzle velocity of this ammunition?
A: The muzzle velocity of Underwood .40 S&W Assured Stopping Power 135gr JHP Ammo is 1,400 feet per second (fps), providing quick impact and reliable stopping power.
Q: Is this ammunition suitable for self-defense use?
A: Yes, this Underwood .40 S&W Assured Stopping Power ammunition is designed for self-defense applications, featuring a jacketed hollow point bullet for controlled expansion and stopping power.
- UPC:
- 816874020705
- Brand:
- Underwood Ammo
- Caliber:
- .40 S&W
- Condition:
- New
- Bullet Type:
- JHP: jacketed hollow point
- Bullet Weight (Grains):
- 135
- Casing:
- Brass









