SMALL ARM CARTRIDGE Russian patent published in 1997 - IPC

FIELD: ammunition. SUBSTANCE: cartridge has initiation aid, propelled gear and composite powder charge composed of layer of pyroxylene and layer of smoke gun powder in proportion from 44.4 to 84.0% and 55.6 to 16.0% correspondingly. It is also preferable to adhere to following conditions: relation of mass of propelled gear to area of its cross-section and mass of powder charge lies within 0.032 to 0.145 mm mm^-2, final pulse of pressure of powder gases formed by function of charge lies within 15.0 to 55.0 kgf/sq. dm. It also envisaged to use powder based on pyroxylene containing nitroglycerin with optimum mass relation from 12.0 to 22.0 % and gravimetric density from 0.7 to 1.1 g/cu.cm with diameter (thickness of burning arc) of grains from 0.18 to 0.40 mm. EFFECT: increased functional efficiency. 6 cl, 1 dwg , 3 tbl