Gun chamber

Abstract

The present invention provides a gun chamber configured for accepting an efficient gun cartridge where the efficiency of the gun cartridge is determined by determining the water weight volume of the cartridge; determining the bore diameter of the gun barrel; determining the weight of the bullet; and calculating the efficiency rating of the cartridge by multiplying the water weight volume by the bore diameter and dividing by the bullet weight. The efficiency rating is optimal between 110 and 145 when the water weight volume is determined in grains, the bore diameter is determined in thousandths of inches and the bullet weight is determined in grains. One such 50 caliber gun cartridge has a casing diameter of approximately 0.688 inches and neck portion which accepts a bullet having a bore diameter of approximately 0.510 inches. The case has a length ranging from 1.90 inches to 2.5 inches measured from the primer to the mouth of the neck.

We claim:  
     
         1 . A gun configured to accept an efficient 50 caliber gun cartridge having a proximal and distal end for propelling a projectile comprising: 
 an action;    a barrel; and    a chamber for housing a gun cartridge comprising: 
 a rimless cylindrical casing having a diameter of approximately 0.688 inches at the distal end and a shoulder at the proximal end angling inward as a means to allow easier feeding in a machine gun;  
 a primer mounted on said cylindrical casing; and  
 a neck portion extending distally from the shoulder wherein said neck portion has a mouth for accepting a projectile having a bore diameter of approximately 0.510 inches;  
 wherein said casing has a length ranging from 1.9 inches to 2.5 inches measured from the primer to the mouth of said neck; and  
 wherein said length of said casing is dependant upon water weight volume of said casing, said bore diameter of said mouth, and weight of the projectile.  
   
     
     
         2 . The gun of  claim 1 , wherein the chamber is configured to house the cartridge and the projectile with a combined maximum length of 4.0 inches.  
     
     
         3 . The gun of  claim 1 , wherein said water weight of said casing in grains multiplied by said bore diameter of said mouth in thousandths of an inch divided by said weight of the projectile in grains is greater than or equal to 110 and less than or equal to 145.  
     
     
         4 . A gun chamber for use with a gun action and barrel, and configured for accepting an efficient 50 caliber gun cartridge having a proximal and distal end for propelling a bullet of a predetermined weight comprising: 
 a case section proximal to the action and configured for housing a cartridge case having a diameter of approximately 0.688 inches at the distal end;    a free bore section proximal to the barrel and distal end of the cartridge;    a shoulder section at the proximal end angling inward from the case section; and    a neck portion located between the shoulder section and the free bore section wherein the neck portion is configured for accepting a cartridge having a mouth with a bore diameter of approximately 0.510 inches for accepting a bullet;    wherein the case section has a length ranging from 1.9 inches to 2.5 inches; and    wherein the length of the case section is dependant upon water weight volume of the casing, the bore diameter of the gun barrel, and the weight of the bullet.    
     
     
         5 . The gun chamber recited in  claim 4 , wherein the water weight of the casing in grains multiplied by the bore diameter of the mouth in thousandths of an inch divided by the weight of the bullet in grains is greater than or equal to 110 and less than or equal to 145.  
     
     
         6 . The gun chamber recited in  claim 4 , wherein the shoulder section angles inward at angle of 25 to 30 degrees.  
     
     
         7 . The gun cartridge recited in  claim 4 , wherein the case section, the shoulder section, the neck section and the free bore section have a maximum length of 4.0 inches.