Cartridge case modifying jig

Abstract

A cartridge case modifying jig, comprising: a jig body comprising a central alignment hole configured to concentrically align a drill bit and/or a thread tap with a cartridge case along a center axis; a cartridge holder configured to hold the cartridge case in alignment with the center axis; and one or more guide inserts removably positioned within the alignment hole, configured to reduce wear and/or to accommodate various drill bit or thread tap sizes.

What is claimed is: 
     
         1 . A cartridge case modifying jig, comprising:
 a jig body comprising a central alignment hole configured to concentrically align a drill bit and/or a thread tap with a cartridge case along a center axis; and   a cartridge holder configured to hold the cartridge case in alignment with the center axis.   
     
     
         2 . The jig of  claim 1 , further comprising:
 one or more guide inserts removably positioned within the alignment hole, configured to reduce wear and/or to accommodate various drill bit and/or thread tap sizes.   
     
     
         3 . The jig of  claim 1 , wherein:
 the cartridge holder comprises a reloading die that is configured to hold the cartridge case.   
     
     
         4 . The jig of  claim 1 , further comprising:
 a side port in the jig body.   
     
     
         5 . The jig of  claim 1 , wherein:
 the jig body is polygonal in shape in a cross section that is perpendicular to the center axis.   
     
     
         6 . The jig of  claim 2 , wherein:
 the one or more guide inserts are hollow-core threaded plugs configured to be screwed or pressed into the alignment hole.   
     
     
         7 . The jig of  claim 1 , wherein:
 the alignment hole is configured to limit off-axis movement of the drill bit or thread tap during a drilling or tapping operation.   
     
     
         8 . The jig of  claim 3 , further comprising:
 a lock ring configured to control positioning of the cartridge holder in relation to the jig body.   
     
     
         9 . A cartridge case modifying kit, comprising:
 the cartridge case modifying jig of  claim 1 ;   a drill bit configured for use with the jig; and   a thread tap configured for use with the jig.   
     
     
         10 . The kit of  claim 9 , further comprising:
 a plurality of drill bits and thread taps selected to accommodate various cartridge case sizes and specifications.   
     
     
         11 . The kit of  claim 9 , wherein:
 the drill bit and thread tap are provided as a combination drill/tap tool.   
     
     
         12 . The kit of  claim 9 , further comprising:
 one or more guide inserts configured to be removably positioned within the alignment hole, and configured to reduce wear and/or to accommodate various drill bit and/or thread tap sizes.   
     
     
         13 . The kit of  claim 9 , further comprising:
 a reloading die configured to secure the cartridge case in the jig body.   
     
     
         14 . The kit of  claim 9 , further comprising:
 an instruction manual for performing drilling and tapping operations.   
     
     
         15 . The kit of  claim 9 , wherein:
 the components of the kit are provided in a case for transport and storage.