Resizing die for spent straight wall cartridges

Abstract

A die for resizing spent straight wall cartridges that is suitable for use in a reloading press. The die contains a pair of spaced apart resizing rings that are arranged to size the bullet chamber of the cartridge casing to a smaller diameter than the charge chamber of the casing to improve the firing performance of the reloaded cartridge.

1 . A resizing die for producing two separate diameters in a straight wall casing of a spent cartridge that includes:
 a die body having a distal end and a proximal end, said die body further including a bore that passes into said die body through an opening in said distal end;   said die body housing an outer resizing ring mounted in said opening at said distal end of said die body;   said die body further housing an inner resizing ring mounted in said bore in axial alignment and at a given distance from said outer resizing ring; and   said outer resizing ring containing a first inside diameter that is larger than a second inside diameter that is contained in said inner resizing ring such that two separate diameters are produced within a casing of a spent straight wall cartridge that is advanced into said die body though said distal wall opening.   
     
     
         2 . The die of  claim 1 , wherein said first inside diameter of said outer resizing ring is between 0.002″ and 0.010″ larger than said second inside diameter of said inner resizing ring. 
     
     
         3 . The die of  claim 1 , wherein each of said resizing rings is fabricated of a carbide material. 
     
     
         4 . The die of  claim 1 , that further includes spacer means within said bore for maintaining said given distance between said resizing rings. 
     
     
         5 . The die of  claim 1 , that further includes means for adjustably mounting said die body within a resizing press. 
     
     
         6 . The die of  claim 1 , that further includes a decapping means adjustably mounted within the bore of said die body for ejecting a primer from said cartridge as said cartridge is advanced through said first and second resizing dies. 
     
     
         7 . A die for resizing the casing of a spent straight wall cartridge that includes:
 an elongated die body having a distal end and a proximal end, said body further including a bore that passes axially through said body between distal end wall and a proximal end wall;   said bore containing an axially aligned, radially expanded, cylindrical retention chamber having an open entrance at one end thereof that is located in said distal end wall and a radially extended shoulder at its other end;   an inner resizing ring mounted within said retention chamber in abutting contact with said shoulder, said inner resizing ring having a first inside diameter,   a cylindrical spacer having a distal end and a proximal end mounted within said retention chamber with said proximal end of spacer in abutting contact with said inner resizing ring.   an outer resizing ring mounted within said opening of said retention chamber in abutting contact with said distal end of said spacer and having a second inside diameter that is larger than that of said inner resizing ring; and   locking means for maintaining said outer resizing ring within said opening in abutting contact with said spacer.   
     
     
         8 . The die of  claim 7 , wherein said locking means is a crimped rim that surrounds the entrance to said retention chamber which is in abutting contact with said outer resizing ring. 
     
     
         9 . The die of  claim 7 , wherein said inner and outer resizing rings are mounted in a tight sliding relationship with an inside wall of said retention chamber to prevent radial displacement of said resizing rings. 
     
     
         10 . The die of  claim 9 , wherein said cylindrical spacer has an inside diameter that is larger than the inside diameter of said outer resizing ring. 
     
     
         11 . The die of  claim 7 , wherein said resizing rings are fabricated of a carbide material. 
     
     
         12 . The die of  claim 7 , wherein said die further includes means for adjustably mounting said die body within a resizing press. 
     
     
         13 . The die of  claim 7 , that further includes a decapping means mounted within said bore for ejecting a primer from a cartridge that is advanced into said bore through said distal end entrance. 
     
     
         14 . The die of  claim 7 , wherein the inside diameter of said outer resizing ring is between 0.002″ and 0.010″ larger than that of said inner resizing ring. 
     
     
         15 . The die of  claim 7 , wherein said die body is cylindrical and contains a male outer thread that extends along at least a portion of its outer surface whereby said die can be threaded into a die press.