FIRE ARM ROUND BULLET Russian patent published in 2011 - IPC F42B30/02 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to small arms, particularly, to round bullets. Round bullet consists of bimetal shell accommodating a core. Said bimetal shell has cylindrical outer surface and curvilinear head part. Said outer cylindrical surface has grooves with depth making 0.4-0.9 of barrel bore rifling groove ledge height. Grooves are made at the angle to bullet lengthwise axis in number multiple of the number of barrel bore rifling groove ledges.

EFFECT: higher accuracy of hits.

6 cl, 3 dwg