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223 Remington 55 Grain Controlled Chaos

0.55 LBS

Product Description

The development of this technology was the result of an animal control agency's request for a lead free bullet that would provide an extensive wound trauma with minimal pass through energy.  Basically, the idea was to burst the bullet into numerous particles at a predetermined depth creating many wounds and a large temporary cavity at or near the central nervous system with proper shot placement.  The agency had tried copper matrix frangible projectiles and found the penetration depth and particle size were less than what was required for proper terminal performance.

The bullet is designed to penetrate to a specific depth and to fracture as the internal hydraulic pressure exceeds the hoop strength of the nose design.  At the time of fracture, a massive energy spike is released as the particles break away and radiate outward from the initial trajectory path. This energy spike, and resulting temporary cavity, sends a shock wave through the animal's circulatory and nervous systems, immediately shutting down the functioning parts of these systems.

The Controlled Chaos technology differs from the Controlled Fracturing technology in that the fracturing particles are smaller, the penetration depth of the smaller particles is less, and the initial energy transfer is greater. These features make this an excellent choice for:

  • varmint hunting,
  • animal culling,
  • fur hunting, and
  • personal defense.

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 box primed, reloadable brass cases.

Technical Information

  • Caliber: 223 Remington
  • Bullet Weight: 55 Grains
  • Bullet Style: Controlled Chaos
  • Case Type: Brass
Ballistics Information:
  • Muzzle Velocity: 3250 fps
  • Muzzle Energy: 1290 ft. lbs.

Product Reviews

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  1. Ideal for home defense and Coyote 5 Star Review

    Posted by on 12th Nov 2016

    This ammo is amazingly versatile. It won't over penetrate in a household/urban environment but will definitely ruin somebody's day. That frangible shrapnel goes everywhere and that 22 size leftover bullet penetrates fairly deep. If out in the wilderness I would trust it to protect me from a mountain lion for sure.

  2. Incredible Ammo and Experience! 5 Star Review

    Posted by on 22nd Sep 2016

    First off the Ammo is by far the best quality, the staff is incredible and the shipping is so fast that I seriously can not believe it!! Thank you so much!!

  3. absolutely perfect 5 Star Review

    Posted by on 23rd Aug 2016

    Underwood is my favorite ammunition company for loads like this, extremely accurate for me a 2in 10 shot group at 50 and devastating results on 2 liters and Going through wood into water filled buckets. This is my go to defense and hunting round thank you underwood for a great price a perfect product and only taking two days to ship.

  4. Great Home Defense 5 Star Review

    Posted by on 10th Apr 2016

    All the Underwood loads with the Lehigh bullets are top notch best ammo I've ever used. Devastating performance and consistent.

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