Chamber Reamer for Multi-Piece Polymer Ammunition

Abstract

The present invention provides a chamber reamer used to form a chamber in a firearm wherein the chamber is adapted to fit a multi piece ammunition cartridge comprising: a reamer comprising a reamer profile corresponding to an ammunition cartridge having a reduced neck height comprising: a shortened neck having a projectile aperture, wherein the shortened neck is reduced by 25-100% of the neck height of a standard cartridge neck; a shoulder extending from the shortened neck to a cartridge side wall; and wherein the cartridge side wall extends from the shoulder to the base to form an interior propellant chamber; wherein the base comprises an extraction ring, a primer recess positioned in the base in communication with the propellant chamber through a flash hole that extends from the primer recess into the propellant chamber.

What is claimed is: 
     
         1 . A chamber reamer used to form a chamber in a firearm wherein the chamber is adapted to fit a multi piece ammunition cartridge comprising:
 a reamer comprising a reamer profile corresponding to an ammunition cartridge having a reduced neck height comprising: a shortened neck having a projectile aperture, wherein the shortened neck is reduced by 25-100% of the neck height of a standard cartridge neck; a shoulder extending from the shortened neck to a cartridge side wall; and wherein the cartridge side wall extends from the shoulder to the base to form an interior propellant chamber; wherein the base comprises an extraction ring, a primer recess positioned in the base in communication with the propellant chamber through a flash hole that extends from the primer recess into the propellant chamber.   
     
     
         2 . The chamber reamer according to  claim 1 , wherein the chamber is adapted accept a 5.56 mm, 7.62 mm, 12.7 mm, 14.5 mm, .223, .243, .277, .300, .308, .338, or a .50 caliber ammunition cartridge. 
     
     
         3 . The chamber reamer according to  claim 1 , wherein the multi piece ammunition cartridge is a 5.56 mm, 7.62 mm, 12.7 mm, 14.5 mm, .223, .243, .277, .300, .308, .338, or a .50 caliber ammunition cartridge. 
     
     
         4 . The chamber reamer according to  claim 1 , wherein the shortened neck is reduced by 5 to 100% compared to the neck of a conventional ammunition cartridge. 
     
     
         5 . A chamber reamer used to form a chamber in a firearm to accept a multi piece ammunition cartridge comprising:
 a reamer comprising a reamer profile where in the reamer profile comprises an ammunition neck portion wherein the ammunition neck portion corresponds to an ammunition cartridge having a shortened neck is reduced by 25-100% of the neck height of a standard cartridge neck;   an ammunition shoulder portion extending from the ammunition neck portion; and   an ammunition body portion extending from the ammunition shoulder portion.   
     
     
         6 . The chamber reamer according to  claim 1 , wherein the chamber is adapted accept a 5.56 mm, 7.62 mm, 12.7 mm, 14.5 mm, .223, .243, .277, .300, .308, .338, or a .50 caliber ammunition cartridge. 
     
     
         7 . The chamber reamer according to  claim 1 , wherein the multi piece ammunition cartridge is a 5.56 mm, 7.62 mm, 12.7 mm, 14.5 mm, .223, .243, .277, .300, .308, .338, or a .50 caliber ammunition cartridge. 
     
     
         8 . The chamber reamer according to  claim 1 , wherein the shortened neck is reduced by 5 to 100% compared to the neck of a conventional ammunition cartridge.