Patent ID: 10386164

Abstract:
The invention relates to small arms ammunition and can be used in the designs of projectiles intended for high precision long-range firing at supersonic and subsonic muzzle velocities of a projectile.A projectile of small arms ammunition comprises a head portion with a blunted nose surface, a central leading portion, and a boattail, which tapers towards the projectile base, wherein the largest diameter of the cross-section of the central leading portion is equal to “D”, the length of the head portion is equal to 1.9-2.9D, and the diameter at the interface between the nose surface and the lateral surface of the head portion is equal to 0.15-0.3D. The lateral surface of the head portion is limited by the surface of two adjoining truncated cones, namely a front cone and a rear cone with opening angles equal to 22-30 degrees and 8-16 degrees respectively, wherein the smaller base of the front truncated cone abuts the nose surface, and the larger base of the rear truncated cone abuts the surface of the central leading portion. Between the central leading portion and the boattail a step transition is made so that the largest diameter of the cross-section of the boattail is equal to 0.94-0.97D and is less than the diameter of the barrel bore measured at the rifling lands. The invention provides an increase in the ballistic characteristics of projectiles on the trajectory and a decrease in projectiles dispersion.