| 摘要 |
The cartridge includes a powder charge shell (11), a projectile (1) of the diameter identical with the muzzle dia. and having a plurality of grooves (4) made longitudinally parallel or spiral on the outer surface across the whole length, an axial lead cup (6) having a protuberant ring (8) of a slightly larger dia. than the dia. of the projectile (1) and being sealed within the shell (11). The cup also is provided with a plurality of fingers (9) that link to the grooves (4) and upon projection spin the cup (6) and the projectile (1) with cooperation of the rifle grooves.
|
