Lead shot filled cartridge - has helical wall slots forming wings spreading to rotate cartridge when fired

摘要

A cartridge has a casing filled with lead shot with helical slots (3) down its sides, thus leaving a set of e.g. four wings (2) which spread out during flight, causing the cartridge to rotate about its axis. Inside is a cone (4) with grooves (5) down its sloping side so as to cause the leads hot to be ejected uring the flight, and causing the shot to follow a whirling trajectory when ejected during the flight. These grooves connect the cone to the wings. The insde of the base (1) around the cone is curved. In an alternative design, an additional sleeve with further slots surrounds the cone.