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Subsonic ammunition casing

  • US 9,395,165 B2
  • Filed: 10/06/2015
  • Issued: 07/19/2016
  • Est. Priority Date: 07/28/2011
  • Status: Active Grant
First Claim
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1. A method of reusing a subsonic ammunition article comprising:

  • providing a casing defining a generally cylindrical hollow body having a metallic cap at a first end thereof and a caselet at a second end thereof, the caselet having a proximal end defining a body region and a distal end defining a neck region, wherein the cap is interconnected with the proximal end of said caselet such that the casing at least partially encloses an internal cavity, and wherein the outer diameter of the caselet narrows from a first diameter at the body region to a second diameter at the neck region, the article having at least one propellant chamber disposed within the internal cavity of the casing, the propellant chamber having an open internal volume that is at least 20% reduced in comparison to the open internal volume of a standard casing of identical caliber, the casing further having a propellant disposed and confined within said propellant chamber and a primer disposed at the first end of said casing in combustible communication with said propellant, wherein the caselet and the propellant chamber at least partially comprise a polymeric material, and wherein the ratio of the minimum thickness of the wall of the body region of the caselet to the average wall thickness of the neck region of the ammunition casing is greater than 3;

    firing the ammunition article; and

    discarding the fired polymeric caselet, retaining the fired metallic cap and attaching a new polymeric caselet to the existing metallic cap.

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