Rifle Cartridge

Abstract

A rifle cartridge is formed to have an overall length of about 2.800 inches, or 71.12 millimeters. The shell case has a case length between 1.900 inches and 1.950 inches and a neck forming a mouth for a standard .270 caliber bullet. The shoulder adjoining the neck widens from the neck to a diameter of between 0.445 inches to 0.465 inches, and preferably 0.450 inches. The adjoining shell body forms the main powder chamber for receiving an explosive charge. A head adjoins the shell body and forms a base of the shell case. The head has a primer pocket formed therein communicating with the main powder chamber through a vent hole formed between the primer pocket and the main powder chamber.

1 . A rifle cartridge, comprising:
 a shell case having a case length between 1.900 inches and 1.950 inches and having a neck forming a mouth for a standard .270 caliber bullet;   a shoulder adjoining said neck and widening from said neck to a diameter of between 0.445 inches to 0.465 inches;   a shell body adjoining said shoulder and having an interior forming a main powder chamber for receiving an explosive charge;   a head adjoining said shell body and forming a base of said shell case, said head having a primer pocket formed therein communicating with said main powder chamber through a vent hole formed between said primer pocket and said main powder chamber.   
     
     
         2 . The rifle cartridge according to  claim 1 , wherein said shoulder is formed by a conical wall enclosing an angle of 20 to 45 degrees relative to a longitudinal axis of the cartridge. 
     
     
         3 . The rifle cartridge according to  claim 2 , wherein said head is formed with a rim rendering the cartridge a rimmed cartridge. 
     
     
         4 . The rifle cartridge according to  claim 2 , wherein said conical wall encloses an angle of 25 to 45 degrees with the longitudinal axis of the cartridge and the cartridge is formed as a rimless cartridge. 
     
     
         5 . The rifle cartridge according to  claim 1 , wherein said shoulder walls enclose an angle of substantially 60° with one another. 
     
     
         6 . The rifle cartridge according to  claim 5 , wherein said shoulder walls merge towards an imaginary apex lying on the longitudinal axis of the cartridge and the imaginary apex lies within said neck. 
     
     
         7 . The rifle cartridge according to  claim 1 , wherein said shell case has a case length of 1.924 inches. 
     
     
         8 . The rifle cartridge according to  claim 1 , wherein said shoulder widens to a widest diameter of 0.450 inches. 
     
     
         9 . The rifle cartridge according to  claim 1 , wherein said neck has a diameter of substantially 0.315 inches to avoid confusion with 6.5 mm caliber cartridges.