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The Underwood Controlled Chaos .223 Remington rounds pack serious terminal performance in a compact 20-round box. These are machined from solid copper, which means no lead and complete compliance with lead-free hunting zones. The 62-grain bullet leaves the barrel at 3,100 feet per second with 1,323 foot-pounds of muzzle energy, giving you plenty of velocity and knock-down power in the .223 platform.
These aren't your standard hollow points. The Controlled Chaos design was originally developed for wildlife management to deliver maximum energy transfer without excessive pass-throughs. The solid copper bullet penetrates to a specific depth, then the front portion fractures into multiple petals that radiate outward. The bore-diameter base continues straight through, creating both a massive temporary wound cavity and deep penetration. This separation happens through internal hydraulic pressure when the bullet meets soft tissue, which is why these are considered barrier-blind. They won't expand on drywall or other hard barriers, only when impacting fluid or soft tissue.
Every Underwood round uses flash-suppressed powder, which matters more than people realize if you ever need to use your rifle in low light. Your vision stays intact instead of getting blown out by muzzle flash. The nickel-plated brass cases feed reliably through modern rifles and resist corrosion better than standard brass during storage. These cases are boxer primed and reloadable, so if you're into handloading, you've got quality brass to work with.
Underwood backs all their ammunition with rigorous field testing in real-world firearms, not just lab testing. The ammunition is new production, non-corrosive, and made to their quality standards. Whether you're hunting varmints, working medium game, or focusing on personal defense in lead-free jurisdictions, the Controlled Chaos round delivers.
Controlled Chaos bullets are machined from solid copper and designed to fracture at a specific penetration depth. When the bullet hits soft tissue, the front portion sheds into multiple petals while the solid base continues straight through, creating a massive energy spike with both expansion and deep penetration. Unlike traditional hollow points, they don't expand when hitting barriers like drywall, making them more predictable in real-world scenarios.
Yes. These rounds use solid copper projectiles with no lead content, meeting all lead-free ammunition requirements in states and regions that mandate it. The 62-grain bullet weight and velocity make them effective for varmint and medium game hunting where lead-free ammunition is required or preferred.
Yes, these use boxer-primed nickel-plated brass cases that are fully reloadable. The nickel plating actually improves reloading compared to standard brass because it won't tarnish in storage and provides better corrosion resistance. Just make sure to clean your bore of any non-Lehigh Defense copper fouling before shooting these for best accuracy.
Flash-suppressed powder significantly reduces muzzle flash, which means your night vision won't be compromised if you ever need to use your rifle in low light. This is particularly valuable for defensive scenarios where maintaining your vision after the first shot is critical.
| Caliber/Gauge | .223 REM/5.56 NATO |
|---|---|
| Case Material | Nickel-Plated Brass |
| Cost per Round | 2.05 |
| Grains | 62 gr |
| Manufacturer | |
| Manufacturer Part Number | 420 |
| Shipping Weight | 0.59 |
| Units per Box | 20 |
| UPC | 816874022693 |
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