Method of making a polymeric subsonic ammunition cartridge
First Claim
Patent Images
1. A method of preparing a polymeric subsonic ammunition comprising the steps of:
- providing a substantially cylindrical primer insert comprising a base having a top surface opposite a bottom surface, a substantially cylindrical coupling element that extends from the top surface;
a primer recess formed in the bottom surface;
a primer flash hole aperture positioned in the primer recess to extend through the bottom surface; and
a flash hole groove positioned in the primer recess around the primer flash hole aperture;
forming a substantially cylindrical polymeric middle body by overmolding the substantially cylindrical primer insert through the primer flash hole aperture into the flash hole groove and extending the overmolding to a substantially cylindrical polymeric coupling region;
providing a substantially cylindrical polymeric bullet-end component comprisinga substantially cylindrical polymeric coupling end opposite a bullet aperture;
inserting a propellant insert into the propellant chamber to reduce the internal volume of the propellant chamber by at least 10% less;
coupling the substantially cylindrical polymeric coupling end to the substantially cylindrical polymeric coupling region to form a propellant chamber that extends from the bullet aperture to the primer flash hole;
inserting a diffuser into the primer recess;
inserting a primer into the primer recess to contact the diffuser;
adding a propellant to the propellant chamber; and
inserting a projectile in the bullet aperture.
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Abstract
The present invention provides a method of making a subsonic ammunition cartridge having a polymeric casing body having a generally cylindrical hollow polymer body having a body base at a first end thereof and a mouth at a second end to define a propellant chamber; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber, wherein the propellant chamber has an internal volume that is at least 10% less than the open internal volume of a standard casing of equivalent caliber; and a primer insert positioned in the body base and in communication with the propellant chamber.
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Citations
19 Claims
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1. A method of preparing a polymeric subsonic ammunition comprising the steps of:
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providing a substantially cylindrical primer insert comprising a base having a top surface opposite a bottom surface, a substantially cylindrical coupling element that extends from the top surface;
a primer recess formed in the bottom surface;
a primer flash hole aperture positioned in the primer recess to extend through the bottom surface; and
a flash hole groove positioned in the primer recess around the primer flash hole aperture;forming a substantially cylindrical polymeric middle body by overmolding the substantially cylindrical primer insert through the primer flash hole aperture into the flash hole groove and extending the overmolding to a substantially cylindrical polymeric coupling region; providing a substantially cylindrical polymeric bullet-end component comprising a substantially cylindrical polymeric coupling end opposite a bullet aperture; inserting a propellant insert into the propellant chamber to reduce the internal volume of the propellant chamber by at least 10% less; coupling the substantially cylindrical polymeric coupling end to the substantially cylindrical polymeric coupling region to form a propellant chamber that extends from the bullet aperture to the primer flash hole; inserting a diffuser into the primer recess; inserting a primer into the primer recess to contact the diffuser; adding a propellant to the propellant chamber; and inserting a projectile in the bullet aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification