Firearm barrel reamer having a cartridge chamber

Abstract

The present invention provides a chambering device for a barrel of a gun comprising: a shank extending longitudinally between a front end and a rear end and having a plurality of cutting flutes disposed between the front end and the rear end; a shaft extending to the rear end of the shank and adapted to rotate the shank along an interior of the barrel to form a chamber therein, wherein the shank comprises a body region that extends to a shoulder region that transitions to a case mouth that extends to a throat connected to a free bore, wherein the body region comprises a rear diameter near the breech face of about 0.4718; and a body shoulder junction diameter of about 0.4625; wherein the shoulder region comprises a shoulder case mouth junction diameter is between 0.31 to 0.32; a breech face to lead-in bore junction length of between 2.1 to 2.2; a breech face to body-shoulder junction length of between 1.80-1.85; and a breech face to shoulder neck junction length of between 1.9-2.0.

What is claimed is: 
     
         1 . A chambering device for a barrel of a gun comprising:
 a shank extending longitudinally between a front end and a rear end and having a plurality of cutting flutes disposed between the front end and the rear end;   a shaft extending to the rear end of the shank and adapted to rotate the shank along an interior of the barrel to form a chamber therein, wherein the shank comprises a body region that extends to a shoulder region that transitions to a case mouth that extends to a throat connected to a free bore, wherein the body region comprises
 a rear diameter near the breech face of about 0.4718; and 
 a body shoulder junction diameter of about 0.4625; 
   wherein the shoulder region comprises
 a shoulder case mouth junction diameter is between 0.3100-0.3200; 
 a breech face to lead-in bore junction length of between 2.1000-2.2000; 
 a breech face to body-shoulder junction length of between 1.8000-1.8500; and 
 a breech face to shoulder neck junction length of between 1.9000-2.0000. 
   
     
     
         2 . The chambering device of  claim 1 , wherein the shoulder case mouth junction diameter is 0.3169. 
     
     
         3 . The chambering device of  claim 1 , wherein the breech face to lead-in bore junction length of about 2.2272. 
     
     
         4 . The chambering device of  claim 1 , wherein the breech face to body-shoulder junction length of about 1.8229. 
     
     
         5 . The chambering device of  claim 1 , wherein the breech face to shoulder neck junction length of about 1.9490. 
     
     
         6 . The chambering device of  claim 1 , wherein the shoulder taper angle is about 30 degrees. 
     
     
         7 . The chambering device of  claim 1 , wherein the front end has a diameter less than the diameter of the shank. 
     
     
         8 . The chambering device of  claim 1 , wherein the shaft is adapted to be matingly received within the front end of the shank to transfer rotation to the shank. 
     
     
         9 . A chambering device as set forth in  claim 1  wherein the shank is substantially cylindrical.