CARTRIDGE FOR SMOOTH-BORE GUNS Russian patent published in 2014 - IPC F42B7/02 F42B7/08 

FIELD: weapons and ammunition.

SUBSTANCE: cartridge comprises a sleeve, a detonator, a propellant powder, dummy and thrown element. The propellant powder is divided into three parts by two diaphragms with holes. For a part of the propellant powder which is located near the detonator, and for the middle part of the propellant powder either one brand of powder with the same rate of combustion is used or different brands of powder with different rates of combustion. For the third part another brand of powder is used, with the rate of combustion different from the rate of combustion of the brand of powder used in the part of the propellant powder, located near the detonator, and in the middle part of the propellant powder.

EFFECT: increase in the initial rate of the shot charger flight without increasing pressure of propellant gases during firing.

3 cl, 1 dwg