Underwood Personal Defense 10mm Auto Ammo 115 Grain Xtreme Defender - 810

Underwood Personal Defense 10mm Auto Ammo 115 Grain Xtreme Defender - 810

Underwood 10mm Auto 115 grain Xtreme Defender ammunition is engineered for personal defense applications requiring high velocity and consistent terminal performance. This load utilizes a solid copper projectile with a fluted design, eliminating the need for traditional expansion while still producing an effective wound channel. With a muzzle velocity of 1,700 feet per second and 738 foot-pounds of energy, it delivers a fast, flat-shooting profile with strong impact characteristics. The lightweight bullet contributes to reduced recoil compared to heavier 10mm loads while maintaining high velocity. Nickel-plated brass casings support reliable feeding and improved corrosion resistance during carry and storage. Packaged in 20-round boxes or 200-round cases, with bulk ammo shipping free through Target Sports USA.

Features and Specifications:

• Caliber: 10mm Auto for semi-automatic handgun platforms
• Bullet Type: 115 grain Xtreme Defender solid copper fluted projectile
• Velocity: Muzzle velocity of 1,700 fps for high-speed performance
• Fluted Projectile Design: Engineered to create a consistent wound channel without traditional expansion
• Nickel-Plated Brass: Improves feeding reliability and corrosion resistance
• Packaging: 20-round boxes or 200-round cases

Deep Dive

Overview

Underwood 10mm Auto 115 grain Xtreme Defender ammunition is designed to deliver consistent penetration and effective terminal performance across both defensive and field applications. The solid copper fluted projectile redirects energy outward on impact, creating a wide wound channel without relying on a conventional hollow point design. This allows the bullet to maintain structural integrity while still producing expansion-like effects across a range of conditions, including when encountering intermediate barriers. Its high velocity and lighter bullet weight contribute to manageable recoil and fast follow-up shots. This load is well suited for personal defense and can also be used for hunting applications where consistent penetration and reliable terminal behavior are important.

History and Development

Underwood Ammo developed its Xtreme series to offer alternatives to traditional expanding handgun bullets by focusing on solid projectile designs that maintain structural integrity while delivering effective terminal performance. Using precision-machined copper bullets with engineered fluting, the design emphasizes consistent results across varying conditions. The Xtreme Defender line refines this concept by balancing velocity and projectile geometry to provide expansion-like performance without depending on hollow point expansion.

Common Questions and FAQs

• Does the Xtreme Defender bullet expand?
  It does not expand like a traditional hollow point, but it produces expansion-like terminal effects through its fluted design.
• What is this ammo best used for?
  It is designed for personal defense and can also be used for hunting where consistent penetration is needed.
• Is this ammunition lead-free?
  Yes, the bullet is made from solid copper and does not contain lead.
• Is this a high-velocity 10mm load?
  Yes, at 1,700 fps, it is a high-velocity load compared to typical 10mm ammunition.
• What are the benefits of nickel-plated brass cases?
  Nickel plating improves feeding reliability, corrosion resistance, and durability during storage or carry.
• Is this ammunition safe for suppressor use?
  Yes, it is safe for suppressor use where applicable and legal.

The 'Round Up'

Perfect Fit for:

• Personal Defense

Why It Stands Out:

Underwood 10mm Auto 115 grain Xtreme Defender ammunition offers a distinct approach to handgun performance through its solid copper, fluted projectile design. Its high velocity and engineered geometry support consistent terminal performance without relying on traditional expansion. Nickel-plated brass and flash-suppressed powder enhance reliability in both defensive and field conditions. Built with Underwood’s focus on performance and consistency, it provides a dependable option for those seeking versatility across personal defense and hunting applications.

Technical Specifications

Mpn	810
Manufacturer	Underwood Ammunition
Platform	Handgun
Ammo type	Xtreme Defense
Caliber	10MM AMMO
Grain weight	115
Quantity per package	Box of 20 / Case of 200
Test barrel length as text	24 in
Muzzle velocity	1700 fps
Muzzle energy	738 ft lbs
Case type	Nickel Plated Brass
Primer type normalized	Centerfire / Boxer
Reloadable	Yes
Lead free	Yes

SHIPPING AMMUNITION

Attention Ammunition Buyers	You must be 21 years or older to order ammunition. Ammo must ship UPS/FedEx Ground. For safety reasons, we cannot accept returns on ammo. Always, make sure that you use the correct ammunition for your gun. Please check local laws before ordering.
Shipping Estimate	Please add the product into your shopping cart to get a shipping estimate
Ammo Shipping Zones	Target Sports USA only ships ammo to Contiguous 48 states only. We do not ship ammo to Alaska & Hawaii
Proposition 65 Warning	This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov.