Hunting bullet comprising an expansion ring

Abstract

The invention relates to the field of ammunition for hunting guns. The ammunition consists of a full-caliber or subcaliber bullet ( 2 ), of the type comprising a substantially rigid bullet body ( 6 ) and a deformable part, the deformable part consisting of an approximately cylindrical expansion ring ( 7 ), the rear part of which is fitted onto the front part of the bullet body ( 6 ). Application to small, medium or large caliber ammunition.

1 . A round for small, medium and large caliber guns, consisting of a full-caliber or subcaliber bullet ( 2 ), of the type comprising a substantially rigid bullet body ( 6 ) and a deformable part, wherein the deformable part consists of an approximately cylindrical expansion ring ( 7 ), the rear part of which is fitted onto the front part of the bullet body ( 6 ).  
   
   
       2 . The round as claimed in  claim 1 , wherein the expansion ring ( 7 ) includes, on its front face ( 21 ), an emergent frustoconical bore ( 20 ), which cooperates with the front face of the head of the bullet body ( 6 ) in order to form an open cavity ( 29 ).  
   
   
       3 . The round as claimed in  claim 2 , wherein the emergent frustoconical bore ( 20 ) on the front face ( 21 ) of the expansion ring ( 7 ) forms, with the external cylindrical part ( 22 ) of the ring, a narrow expansion flat or lip ( 23 ).  
   
   
       4 . The round as claimed in  claim 1 , wherein the rear part of the ring ( 7 ) comprises a stop ( 27 ) that bears against a shoulder ( 28 ) on the bullet body ( 6 ).  
   
   
       5 . The round as claimed in  claim 2 , wherein the base of the emergent frustoconical bore ( 20 ) comprises an annular bearing surface ( 18 ) that bears against the cylindrical surface ( 15 ) of the head of the bullet body and is capable of sliding over said cylindrical surface ( 15 ).  
   
   
       6 . The round as claimed in  claim 5 , wherein the annular bearing surface ( 18 ) is separated from the rear part of the cylindrical ring by an annular groove ( 19 ).  
   
   
       7 . The round as claimed in  claim 1 , wherein the outer surface of the cylindrical ring is slightly conical.  
   
   
       8 . The round as claimed in  claim 7 , wherein the outer surface of the cylindrical ring has a curvilinear ogival shape ( 52 ).  
   
   
       9 . The round as claimed in  claim 1 , wherein the front face of the expansion ring lies substantially in the plane of the face of the head of the bullet body.  
   
   
       10 . The round as claimed in  claim 1 , wherein the front face of the expansion ring is protruding from the head of the bullet body.  
   
   
       11 . The round as claimed in  claim 1 , wherein the front face of the expansion ring is set back relative to the plane of the head of the bullet body.  
   
   
       12 . The round as claimed in  claim 3 , wherein the expansion ring is fitted onto the bullet body by screwing, friction welding, shrink-fitting or force-fitting.  
   
   
       13 . The round as claimed in  claim 12 , wherein the ring is force-fitted onto the bullet body by means of a diamond-shaped knurled contact surface.