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10mm Auto 115 Grain Xtreme Defender

0.55 LBS

Product Description

The Xtreme Defender is based on the popular Xtreme Penetrator product line. The XD ammunition has an optimized nose flute, total weight, and velocity to achieve a penetration depth  up to 18 inches* with a permanent wound cavity (PWC) that is just simply enormous; no other expanding hollowpoint comes close to achieving anywhere near this diameter and volume. Not only is the PWC over 100% larger than any other expanding bullet, expansion is achieved despite being shot through barriers. The solid copper body ensures that wallboard, sheet metal, and automotive glass will have no effect on the Permanent Wound Channel.

*Falling within FBI guidelines 

 This round offers:

  • A permanent wound cavity (PWC)that is 2 times greater than any expanding bullet
  • Reduced recoil.
  • CNC machined from solid copper to overcome barriers to penetration
  • Radial flutes that force the hydraulic energy inward to build pressure
  • Minimal surface area to increase the force at the point of contact and sharp cutting edges that defeat barriers

 Nickel plated casings with our new nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms, enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading.  Nickel plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.

 Until the development of the Ducta-Bright 7a process, nickel plating casings often limited the number of reloads as compared to raw brass.  It was claimed that nickel plated brass casings “embrittled” the brass therefor making it less desirable for reloaders despite the ease of cleanup that nickel plating offers.  In addition, ammunition engineers raising concerns of using nickel plating in “very hot” +P or magnum loads found that traditional nickel plating often cracked deep-drawn cases, or worse, lead to a total failure. This new process eliminates any concern, to the shooter or reloader, of hazard or ability to re-use the brass.

As with all of Underwood Ammo’s rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.

 While taking advantage of our state of the art testing equipment, this high performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. If for some reason Underwood Ammunition fails to meet performance expectations, we stand by our product 100% and will make sure the customer is satisfied with every purchase.

This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Technical Information

  • Caliber: 10mm Auto
  • Bullet Weight: 115 Grains
  • Bullet Style: Lehigh Defense Xtreme Defense
  • Case Type: Ducta-Bright 7a Nickel Brass

Ballistics Information:

  • Muzzle Velocity: 1700 fps
  • Muzzle Energy: 738 ft. lbs.
  • Penetration:18 inches


Product Reviews

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Showing reviews 1-10 of 36 | Next

  1. Amazing 5 Star Review

    Posted by on 15th Jan 2017

    This ammo is exactly what they say it is and does exactly what it's supposed to do.i carry this ammo as well as the 135gr jhp both are outstanding.will continue to purchase and use underwood ammo.for all my firearms

  2. Fire round 5 Star Review

    Posted by on 10th Jan 2017

    Fast defense rounds

  3. Amazing 5 Star Review

    Posted by on 5th Jan 2017

    I just ordered the 115gr XD and it came today went out to shoot some and first thing I see are some hogs on my grand dad's property so I take my Glock 20 and pop a shot off wasn't able to get two off as them hogs started high tailing it out of there but I did get one and I was surprised because this is my self defense ammo and at 115gr i didn't expect it to drop a hog.this is a wicked round and will definitely purchase some more.and also ordering was smooth as butter and shipping was fast as lightning.all in all 100% satisfaction in all categories from underwood.

  4. Simply the best 5 Star Review

    Posted by on 20th Dec 2016

    There are other fast moving bullets on the market but I when I consider capability, velocity, and dependability the Underwood Xtreme Defender is simply the best. I'd was already convinced this bullet caused large PWC's but FreedomLover's vid with concrete blocks took away my doubt about penetration. These rounds performed flawlessly at the range and I think this is the best all around bullet there is.

  5. ammo test 5 Star Review

    Posted by on 18th Dec 2016

    Had feeding issues with 10 mm non-FMJ Hunter ammo into a new aftermarket 6.6 inch barrel. So I bought one box to test it. No feeding issues at all. I mixed it with other ammo and still no feeding issues. Will buy more in the future.

  6. Hard hitting. 5 Star Review

    Posted by on 11th Dec 2016

    GREAT product... ALWAYS had good results with ALL Underwood ammo... will not trust any other for self-defense..

  7. Work of Art 5 Star Review

    Posted by on 7th Dec 2016

    I very much appreciate the artistry of these LeHigh projectiles! I agree with EVERYBODY regarding performance. It is just awesome that they are beautiful as well!

  8. Wow!!! 5 Star Review

    Posted by on 22nd Nov 2016

    I have not had the chance to test this on a hog cadaver yet. But shooting it out of my Glock 20 and model 40 MOS I am impressed. Very very accurate. Spot on at 50 yards. I test my carry ammo on large hog cadavers with the entire hog intact and then do an autopsy. I am expecting good things.

  9. Has some pop! 5 Star Review

    Posted by on 17th Nov 2016

    Sending a few over to Chopinbloc for gel and armor testing. In my Witness pistols for Chronograph:

    EAA Limited Pro 4.75" barrel 1607, 1651, 1660. Average 1639.33 FPS/ 685 LBS
    EAA Super Match 6" barrel 1686, 1714, 1716. Average 1705.4 FPS/ 743 LBS

    Little short of advertised if based on a Glock 20 4.6" barrel.

  10. Extremely accurate! 5 Star Review

    Posted by on 10th Nov 2016

    After purchasing my new Glock 20, 10mm I smithed it up and installed a KKM Prescision barrell. I ran 4 brands of ammo through it on a sandbag rest to test accuracy at 20 yards. All brands had flyers and variying degrees of closeness to the bullseye. I loaded this Underwood 15 grain Xtreme Defense in it and got 1" groups at 20 yards ! The solid brass CNC fluted bullets by Lehigh must be very consistent in weight, together with Underwoods magic loading touch makes for the most impressive combination of accuracy, speed, power, quality, and devistation ! I ordered MORE.

Showing reviews 1-10 of 36 | Next

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