Reduced Jacketed Bullet Bore Resistance

Abstract

A jacketed structure includes at least one penetrator slug; a jacket surrounding the at least one penetrator slug; and a deformable sleeve surrounding a portion of the at least one penetrator slug and encased by the jacket. The deformable sleeve includes porous material, which absorbs plastic deflection of the jacket during an engraving process with a barrel of a weapon during firing. The at least one penetrator slug includes material having a hardness value greater than a hardness value of the jacket and the deformable sleeve. The deformable sleeve surrounds a rear portion of the at least one penetrator slug. The deformable sleeve surrounds approximately half of the at least one penetrator slug. The deformable sleeve is configured to deform symmetrically during firing of a weapon containing the jacketed structure.

What is claimed is: 
     
         1 . A jacketed structure comprising:
 at least one penetrator slug;   a jacket surrounding said at least one penetrator slug; and   a deformable sleeve surrounding a portion of said at least one penetrator slug and encased by said jacket.   
     
     
         2 . The jacketed structure of  claim 1 , wherein said deformable sleeve comprises porous material. 
     
     
         3 . The jacketed structure of  claim 2 , wherein said porous material absorbs plastic deflection of said jacket during an engraving process with a barrel of a weapon during firing. 
     
     
         4 . The jacketed structure of  claim 2 , wherein said porous material comprises sintered material. 
     
     
         5 . The jacketed structure of  claim 1 , wherein said at least one penetrator slug comprises material having a hardness value greater than a hardness value of said jacket and said deformable sleeve. 
     
     
         6 . The jacketed structure of  claim 1 , wherein said deformable sleeve surrounds a rear portion of said at least one penetrator slug. 
     
     
         7 . The jacketed structure of  claim 1 , wherein said deformable sleeve surrounds approximately half of said at least one penetrator slug. 
     
     
         8 . The jacketed structure of  claim 2 , wherein said porous material comprises a porosity between 1% and 50%. 
     
     
         9 . The jacketed structure of  claim 2 , wherein said porous material comprises any of Al, Cu, Fe, Ni, Mo, Ti, and Si. 
     
     
         10 . The jacketed structure of  claim 1 , wherein said deformable sleeve is configured to deform symmetrically during firing of a weapon containing said jacketed structure. 
     
     
         11 . A method comprising:
 providing a jacketed bullet comprising an original length and configured to be inserted into a weapon, said jacketed bullet comprising at least one penetrator slug; a jacket surrounding said at least one penetrator slug; and a deformable sleeve surrounding a portion of said at least one penetrator slug and encased by said jacket; and   configuring said deformable sleeve to deform during firing of the weapon, wherein the deformation of said deformable sleeve absorbs a deformation energy exerted on said jacket thereby retaining said original length of said jacketed bullet during said firing.   
     
     
         12 . The method of  claim 11 , further comprising configuring said deformable sleeve to comprise porous material. 
     
     
         13 . The method of  claim 12 , further comprising configuring said porous material to absorb a plastic deflection of said jacket during an engraving process with a barrel of said weapon during said firing. 
     
     
         14 . The method of  claim 12 , further comprising configuring said porous material to comprise sintered material. 
     
     
         15 . The method of  claim 11 , further comprising configuring said at least one penetrator slug to comprise material having a hardness value greater than a hardness value of said jacket and said deformable sleeve. 
     
     
         16 . The method of  claim 11 , further comprising configuring said deformable sleeve to surround a rear portion of said at least one penetrator slug. 
     
     
         17 . The method of  claim 11 , further comprising configuring said deformable sleeve to surround approximately half of said at least one penetrator slug from a rear portion of said at least one penetrator slug up to a region or closer to where said jacket first encounters rifling lands of said weapon. 
     
     
         18 . The method of  claim 12 , further comprising configuring said porous material to comprise a porosity between 1% and 50%. 
     
     
         19 . The method of  claim 12 , further comprising configuring said porous material to comprise any of Al, Cu, Fe, Ni, Mo, Ti, and Si. 
     
     
         20 . The method of  claim 11 , further comprising configuring said deformable sleeve to deform symmetrically during firing of said weapon containing said jacketed bullet.