SMALL ARMS CARTRIDGES (VARIANTS) Russian patent published in 1998 - IPC

FIELD: cartridges to rifled barrel small arms. SUBSTANCE: cartridge has a case, propellant charge, primer cap and bullet with head, leading and tail parts. The case, primer cap and bullet are positioned in the same longitudinal axis. The contour of the bullet envelope, except for the tail part, is determined by functional dependence relative to the coordinate system for the variant without off- centering of the radius of generating line of the bullet envelope contour in the head part from the bullet base, and for the variant with off-centering. The X-axis is parallel to the cartridge longitudinal axis and matched with the line forming the envelope contour of the bullet leading part, the Y-axis is a line tangent to the bullet point, and the dependence of the bullet envelope contour has regions of determination and variation of function expressed in the form of intervals of specific values. EFFECT: improved design. 2 cl, 3 dwg, 1 tbl