Collection:
Underwood Ammunition
About Underwood Ammunition
Underwood Ammunition is proudly made in the USA and is renowned for its high-velocity, hard-hitting performance tailored for self-defense, hunting, and tactical use. Featuring premium product lines like Xtreme Defender, Xtreme Penetrator, and Match Grade, Underwood uses cutting-edge bullet designs from Lehigh Defense and other top suppliers to ensure maximum energy transfer, deep penetration, and precision accuracy. Built with tight quality control and premium components, Underwood rounds are trusted by professionals and serious shooters. Target Sports USA carries Underwood Ammo in bulk with fast shipping and competitive pricing on calibers like 9mm Luger ammo, .380 ACP ammo, .357 Mag ammo, and 38 special ammo.
Shop Underwood Ammo By Category
Underwood 380 ACP Ammo 68 Grain Xtreme Defender - 638
Underwood .45 Long Colt Ammo 225 Grain Soft Cast Hollow Point – 710
Underwood Xtreme Defender 9mm Luger +P Ammo 90 Grain Solid Monolithic - 816
Underwood Sporting 9mm Luger +P+ Ammo 124 Grain Jacketed Hollow Point - 113
Underwood Xtreme Penetrator 10mm Auto Ammo 140 Grain Solid Monolithic - 648
Underwood 10mm Auto Ammo 200 Grain Black Cherry Coated Flat Nose Hard Cast - 248
Underwood 9mm Luger +P+ Ammo 147 Grain Full Metal Jacket Flat Nose - 111
Underwood 9mm Luger Ammo 90 Grain Xtreme Defender - 815
Underwood Extreme Terminal Performance 357 Magnum Ammo 158 Grain Jacketed Hollow Point - 124
Underwood 50 Beowulf Ammo 350 Grain Full Metal Jacket - 557
Underwood 9mm Luger +P Ammo 68 Grain Xtreme Defender - 864
Underwood 9mm Luger +P Ammo 115 Grain Xtreme Penetrator - 822
Underwood Extreme Terminal Performance (XTP) 357 Magnum Ammo 125 Grain Jacketed Hollow Point - 123
Underwood Sporting 9mm Luger +P+ Ammo 115 Grain Jacketed Hollow Point - 112
Underwood 9mm Luger +P+ Ammo 90 Grain Xtreme Defender - 817
Underwood Extreme Terminal Performance (XTP) 10mm Auto Ammo 155 Grain Jacketed Hollow Point - 232
Underwood Black Cherry Coated 10mm Auto Ammo 220 Grain Flat Nose Hard Cast - 242
Underwood Extreme Terminal Performance 10mm Auto Ammo 200 Grain Jacketed Hollow Point - 246
Underwood 380 ACP Ammo 68 Grain Xtreme Defender - 639
OUR TOP UNDERWOOD AMMO RECOMMENDATIONS
Underwood Sporting 9mm Ammunition 115 Grain Jacketed Hollow Point - 115
Underwood 9mm 115-grain JHP delivers 1200 fps and 368 ft-lbs with Nosler Sporting Handgun bullets. Featuring nickel-plated brass, reloadable boxer primers, and flash-suppressed powder, it offers reliable accuracy and reduced muzzle flash.
| Manufacturer | UNDERWOOD |
|---|---|
| Caliber | 9MM Luger |
| Bullet Type | Jacketed Hollow Point |
| Grain | 115 |
| Muzzle Velocity | 1200 fps |
| Muzzle Energy | 368 ft lbs |
Underwood 357 Magnum Ammunition 125 Grain TAC-XP Hollow Point - 126
Underwood .357 Magnum 125-grain TAC-XP Hollow Point delivers 1650 fps and 756 ft-lbs, ideal for hunting or defense. Features flash-suppressed powder, nickel-plated brass, and reloadable boxer-primed cases for reliable performance.
| Manufacturer | UNDERWOOD |
|---|---|
| Caliber | 357 Magnum |
| Bullet Type | Hollow Point |
| Grain | 125 |
| Muzzle Velocity | 1650 fps |
| Muzzle Energy | 756 ft lbs |
Underwood Maximum Expansion 40 S&W Ammunition 140 Grain Solid Monolithic - 250
Underwood 40 S&W 140 gr Maximum Expansion Solid Monolithic uses Lehigh's razor-sharp petals for massive wound channels. Nickel-plated brass, flash-suppressed powder, reloadable boxer-primed cases lead free at ~1050 fps for hunting/defense.
| Manufacturer | UNDERWOOD |
|---|---|
| Caliber | 40 S&W |
| Bullet Type | Solid Monolithic |
| Grain | 140 |
| Muzzle Velocity | 1050 fps |
| Muzzle Energy | 343 ft lbs |
TOP USES FOR UNDERWOOD AMMO
- Self-Defense and Concealed Carry
- Hunting Medium and Large Game
- Home Defense Applications
- Range Training and Target Practice
- Competitive Shooting
POPULAR UNDERWOOD PRODUCT LINES
- Underwood Xtreme Defender
- Underwood Xtreme Penetrator
- Underwood Match Grade
- Underwood Lehigh Defense
- Underwood Controlled Fracturing
UNDERWOOD AMMUNITION TYPES
- Xtreme Defender (Fluted Solid Copper)
- Xtreme Penetrator (Deep Penetration)
- Jacketed Hollow Point (JHP)
- Full Metal Jacket (FMJ)
- Controlled Fracturing Projectiles
A QUICK "PRIMER" ON UNDERWOOD AMMO
Underwood Ammunition has earned a strong reputation among shooters for producing high-performance cartridges designed for maximum effectiveness in self-defense, hunting, and precision shooting. Founded in the United States, Underwood focuses on innovation and performance, often loading its rounds with advanced bullet designs from Lehigh Defense, including the Xtreme Defender and Xtreme Penetrator lines. These solid copper projectiles use fluid dynamics instead of traditional expansion to achieve deep penetration and wide wound channels, making them unique in the ammunition market.
In addition to its specialty defensive rounds, Underwood also manufactures a variety of calibers in traditional Jacketed Hollow Point (JHP), Full Metal Jacket (FMJ), and Match Grade options, giving shooters flexibility for range training, competitive use, and home defense. Known for producing consistent velocities and using premium components, Underwood is widely trusted by shooters who want uncompromising power and reliability. Whether for concealed carry, handgun hunting, or specialized applications, Underwood Ammunition is recognized as a premium option that pushes the limits of performance while maintaining dependable quality.
TOP CONSIDERATIONS WHEN BUYING UNDERWOOD AMMO
When choosing Underwood Ammunition, it is important to match the right load to your firearm and intended application. Known for powerful ballistics and premium bullet designs, Underwood produces specialized rounds that can serve hunters, concealed carriers, and competitive shooters. Here are the key factors to consider before purchasing.
Use Case Matching: Underwood offers purpose-driven ammo lines. The Xtreme Defender and Xtreme Penetrator are excellent for self-defense and duty use, while Match Grade loads are ideal for accuracy-driven range or competition shooting. Hunters benefit from hard-hitting calibers like 10mm Auto and .357 Magnum.
Product Line Differences: Each Underwood line has unique strengths. Xtreme Defender uses fluted solid copper bullets for controlled wound channels, while Xtreme Penetrator focuses on deep penetration. Match Grade loads deliver precision with carefully selected components. Controlled Fracturing rounds are designed for rapid energy transfer and fragmentation.
Caliber Availability: Underwood manufactures a wide variety of popular calibers, including 9mm, .380 ACP, .357 Magnum, 10mm Auto, .45 ACP, and powerful revolver rounds like .44 Magnum. This range makes it a versatile choice for defensive carry, hunting, or sport shooting.
Performance Expectations: Underwood is known for producing hotter loads than many factory offerings, often maximizing velocity and energy. This results in powerful terminal performance but can also mean sharper recoil, making caliber and firearm selection important for the shooter.
Price & Value: As a premium ammunition brand, Underwood ammo typically comes at a higher price point than standard FMJ range rounds. However, shooters value its advanced bullet designs and proven performance, making it a worthwhile investment for self-defense and hunting.
THE UNDERWOOD AMMO "ROUND UP"
Underwood Ammunition has established itself as a premium choice for shooters who prioritize innovation, power, and precision. Known for its use of Lehigh Defense bullet technology, Underwood pushes the boundaries of defensive and hunting ammo with designs like the Xtreme Defender and Xtreme Penetrator, which deliver exceptional terminal performance without relying on traditional hollow point expansion.
From defensive 9mm and .380 ACP loads to powerful hunting rounds in 10mm Auto, .357 Magnum, and .44 Magnum, Underwood caters to a wide range of shooting needs. Whether for concealed carry, hunting, or accuracy-focused competition, Underwood ammo delivers consistent velocities, dependable reliability, and cutting-edge ballistic performance. At Target Sports USA, bulk Underwood ammo is available with free shipping, giving shooters an affordable way to stock up on one of the industry's most trusted high-performance brands.
