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Primer insert having a primer pocket groove

  • US 10,466,020 B2
  • Filed: 03/27/2018
  • Issued: 11/05/2019
  • Est. Priority Date: 11/10/2010
  • Status: Active Grant
First Claim
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1. A primer insert for use in a polymeric ammunition cartridge comprising:

  • a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface;

    a coupling element that extends from the bottom surface, wherein the coupling element is adapted to receive a polymer overmolding;

    a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall;

    a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and

    one or more pads formed in the recess bottom;

    a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive the polymer overmolding.

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