"NON-WAD BUTTERFLY" BULLET AND CARTRIDGE FOR SMOOTH-BORE WEAPON Russian patent published in 2012 - IPC F42B30/02 

FIELD: weapons and ammunition.

SUBSTANCE: cartridge comprises a case, an igniting facility, a powder charge and a calibre bullet of arrow type of stabilisation. The bullet comprises a head and a tail parts. The bullet is arranged as monolithic in the form of a solid of revolution having a stepped-spindle shape. The head part is formed by serial coupling of a hemispherical head fairing, a cylindrical bullet body and a head and main stops. The tail part comprises a stabiliser adjoining the main obturator belt and having three empennage blades. The alignment system of the bullet is formed by combination of cylindrical surfaces of the obturation belts and peripheral surfaces of the bullet head part stabiliser blades. The obturator system of the bullet is arranged of pulling type and is formed by combination of cylindrical surfaces of the main and head obturator belts. The bullet length makes 1.9-2.2 of the diameter of the cylindrical bullet body. The diameter of the cylindrical body of the head part makes 0.75-0.9 of the diameter of the weapon barrel channel choke. The diameter of the central rod of the bullet stabiliser makes 0.3 of the barrel channel diameter. The diameter of the head and main obturator belts is equal to or slightly exceeds the diameter of the barrel channel. The empennage length and swing of the stabiliser are equal to or slightly exceed the diameter of the barrel channel.

EFFECT: improved accuracy and closer grouping of shots, extended range of an ammunition.

2 cl, 2 dwg