Primer insert having a primer pocket groove
The present invention provides a primer insert for use in a polymeric ammunition cartridge includes 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 substantially cylindrical 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 a groove in the primer recess positioned around the primer flash aperture adapted to receive a polymer overmolding, wherein the groove extends at least partially over the bottom surface and the groove is adapted to receive polymer at least partially over the bottom surface.
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 surface and a circular recess side wall;
a primer flash aperture through the bottom surface, wherein the primer flash aperture is adapted to receive the polymer overmolding to form a flash hole; and
a groove in the primer recess positioned around the primer flash aperture that extends over the recess bottom surface to the circular recess side wall and is adapted to receive a polymer overmolding over the recess bottom surface.
2. The primer insert of claim 1 , wherein the coupling element comprises an inner surface adapted to receive a polymer overmolding and an outer surface adapted to receive a polymer overmolding.
3. The primer insert of claim 1 , wherein the primer insert has a caliber selected from .223, .243, .25-06, .270, .300, .308, .338, .30-30, .30-06, .45-70 or .50-90, 50 caliber, 45 caliber, 380 caliber or 38 caliber, 5.56 mm, 6 mm, 7 mm, 7.62 mm, 8 mm, 9 mm, 10 mm, or 12.7 mm.
4. The primer insert of claim 1 , wherein the primer insert is a 5.56 mm, 7.62 mm, .223, 308, 338, 12.7 mm, and .50 caliber primer insert.
5. The primer insert of claim 1 , wherein the primer insert comprises a metal, an alloy, a polymer or a ceramic alloy.
6. The primer insert of claim 1 , wherein the primer insert comprises steel, nickel, chromium, copper, carbon, iron, stainless steel or brass.
7. The primer insert of claim 1 , wherein the primer insert comprises a 102, 174, 201, 202, 300, 302, 303, 304, 308, 309, 316, 316L, 316Ti, 321, 405, 408, 409, 410, 415, 416, 416R, 420, 430, 439, 440, 446 or 601-665 grade stainless steel.
8. The primer insert of claim 1 , wherein the primer insert comprises a Ti 6 Al 4 V.
9. The primer insert of claim 1 , wherein the primer insert comprises a groove texture.