Method of making a polymeric subsonic ammunition cartridge
AssigneeTrue Velocity IP Holdings, LLC
InventorLonnie Burrow
Life of this patent
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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.
Claims19
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 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.
Dependencies are inferred from the claim text.