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NPA 55 grain 223 HELO Defense / Hunting Cartridge

“High – Expansion – Law Enforcement – Ordinance”

Adopted and Recommended by Law Enforcement

Terminal Ballistics

HELO Defense / Hunting 223 Temporary Wound Cavity

HELO Defense / Hunting 223 Temporary Wound Cavity

All testing was performed using 20% Clear Ballistics gel which accurately simulates calibrated FBI ballistics gelatin. The HELO Defense / Hunting Standard had the following results when fired at a range of 20 yards from a semi-automatic rifle with a 16” barrel.

The NPA proprietary HELO family of products was originally designed for law enforcement application and specifically engineered to performance specifications requested by law enforcement with complex tactical needs. Unlike bonded jacketed bullets, the HELO is formed from a solid piece of high-grade virgin copper. After a proprietary cavity is formed, the copper bullet is subjected to a complexed proprietary manufacturing process which allows the projectile to achieve maximum penetration and expansion while retaining 100% of its weight through certified ballistic gel. The HELO does not break apart like many other copper hollow point bullets seen on the market, giving it a significant advantage in strength and integrity.
HELO Defense/Hunting 55 grain .223 has shown to be an ideal cartridge for hunters of medium sized game. Our cartridge has been proven to be the most effective defense/duty round on the market for many reasons:


  • Retains 100% weight retention through all FBI Protocol tests barriers at 50 yards
  • Black oxide coating reduces copper fouling and drag in a firearm’s barrel
  • Premium surefire clean burning/low flash powder
  • Premium primers crimped and waterproofed to mitigate misfires
  • 100% Lead free projectile
  • 100% bullet recovery rate from carcass without the risk of lead contamination in hunting applications


  • Monolithic Jacket-less solid copper hollow point allows for 100% weight retention
  • Barrier blind projectile for tactical / defense scenarios
  • Annealed to expand and will not break apart into small pieces
  • Deep penetration to hit vitals in defense scenarios
  •  Ensures a humane kill of a trophy animal in hunting scenarios
  • Proprietary interior skives that allow consistent expansion to over twice its original diameter
  • Holds a 1.25” 5 shot group from a 10” test barrel at 100 yards