SMALL ARMS CARTRIDGE Russian patent published in 2003 - IPC

FIELD: small arms ammunition, 5.56 mm caliber cartridges. SUBSTANCE: bullet has first and second driving bands, length of bullet in cartridge equals 4.44-4,60 d, length of core equals 3.72-3.90 d, width of first driving band equals 0.31-0,59 d, width of second driving band equals 0.5-0,8 d, radius of head part of bullet equals 7.73-8.45 d, length of tail part of bullet equals 0.61-0.77 d, where d is bullet caliber. Weight coefficient of bullet is equal to 15.45- 16.68 g/cu cm, charging density is equal to 0.88-0.96 g/cu cm, internal space of bullet is equal to 1.9-2.0 cu cm, thickness of wall of cartridge case at distance 1.44 d is equal to 0.10- 0.14 d, at distance 2.52 d from butt is equal to 0.08-0.11 d, at distance 4.5 d form butt is equal to 0.04-0.08 d. EFFECT: increased efficiency of hitting manpower protected by individual armor means and of military equipment carrying no armor. 1 cl, 3 dwg