"COMBINED BUTTERFLY" BULLET AND CARTRIDGE FOR SMOOTH-BORE WEAPON Russian patent published in 2012 - IPC F42B30/02 F42B10/04 F42B7/10 

FIELD: weapons and ammunition.

SUBSTANCE: calibre bullet of arrow type of stabilisation is arranged as composite from two separate parts: a monolithic head part made of a plastic lead alloy and a tail support-guiding stabilising part made of a polymer material, to form a non-detachable joint between them at the moment of firing and to create a single aerodynamic body of a stepped drop-like shape. The head part of the bullet is formed by serial coupling of a hemispherical blunted head fairing, a cylindrical body of the bullet, comprising a thin-walled jacket in its tail part of its external surface, and the jacket has an end stop in the form of two truncated cones with an angle of cone opening at the top making 60-120°, and a central rod of the bullet head part arranged on the bullet axis in the centre of the dead cylindrical cavity. The tail part of the bullet is formed by a cylinder of tail part coupling with the head part, the tail belt of obturation and the adjoining hollow stabiliser of the bullet with developed empennage. The cartridge comprises a case, an igniting facility, a powder charge and the above bullet, placed in the cartridge case by stabiliser submersion directly into the powder charge.

EFFECT: higher range, accuracy and closer grouping of firing.

2 cl, 2 dwg