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Civil Defense 9mm+ P /9mm+P Ultra-Lights Bullets : Structural Composition, Radiologic Features, Ballistics, and

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This summary is machine-generated.

This study examines two Liberty Ammunition 9 mm+P bullets, Civil Defense and Ultra-Light. Both feature a lead-free copper projectile that fragments on impact, creating unique wound characteristics valuable for forensic analysis.

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Area of Science:

  • Forensic Science
  • Ballistics
  • Wound Analysis

Background:

  • Liberty Ammunition offers 9 mm+P variants (Civil Defense, Ultra-Light).
  • These variants use an identical monolithic copper hollow-point projectile.
  • Differences lie only in cartridge case composition.

Purpose of the Study:

  • Characterize the terminal ballistics of two Liberty Ammunition 9 mm+P bullet variants.
  • Evaluate projectile fragmentation and wound characteristics.
  • Assess the potential for forensic differentiation and tracing.

Main Methods:

  • Projectile analysis upon impact.
  • Examination of entry and exit wounds.
  • Radiographic and autopsy fragment analysis.
  • Comparison of Civil Defense and Ultra-Light variants.

Main Results:

  • The lead-free projectile fragments predictably upon impact.
  • Observed effects include multiple wound channels, temporary cavitation, and limited penetration.
  • Exit wounds are typically absent; entry wounds resemble conventional projectiles.
  • Radiographs may show a base fragment and dispersed radiopaque fragments.

Conclusions:

  • Fragment analysis alone is insufficient for differentiating the two variants without case material.
  • Forensic recognition, coupled with knowledge of specialized sales, aids in ammunition tracing.
  • These characteristics offer investigative value in reconstructing purchase history.