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Lead-Free Expansion Projectile and Manufacturing Process

  • US 20080314280A1
  • Filed: 03/17/2005
  • Published: 12/25/2008
  • Est. Priority Date: 03/17/2005
  • Status: Abandoned Application
First Claim
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1. An expansion projectile for firearms, comprising:

  • (a) a first piece having a deformable, cylindrical projectile body (1) with a front part tapering towards a front end, a set of regularly spaced slits placed at the front end of the projectile and an internal cavity opened towards said front end, composed of an expansion chamber (2) connected to a cylindrical haft extension (3) and(b) a second piece having a plunger (4) with the general shape of a nail with a head (5) and a shank (6), with all elements featuring radial symmetry around the longitudinal axis of the projectile, wherein the plunger (4) is initially positioned so that the external face of the head (5) lies exposed at the very front tip of the projectile and the shank (6) lies inserted into the expansion chamber (2), wherein upon sinking into the projectile body (1), no part of the plunger (4) head (5) touches the internal surface of the expansion chamber (2) except for the bottom of said chamber at the end of the course of the sinking movement.

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