In an ammunition round a substantially full bore diameter bullet has a plurality of elongate grooves either helically formed or parallel with the longitudinal axis of the bullet and a sabot which has a body and fingers which engage with the grooves and seal the bullet in a casing, the sabot having a slightly larger diameter than the bullet so that the sabot is engraved by the rifling slots in the barrel through which the round is to be fired, in order to rotate the bullet. In alternative constructions the grooves contain elongate elements or a plurality of spherical elements to prevent the conically tapered slug or bullet from tilting or cocking in the barrel after firing.
A slug assembly for a shotgun shotshell having a case in which the slug assembly is incorporated, comprising a metal slug having a center axial cavity, an elastically deformable stabilizer which is fitted in the cavity, and a filler which is charged in the cavity. The stabilizer has a plunger having a diameter larger than a diameter of the opening of the cavity of the slug and an annular flange having a diameter substantially identical to a diameter of a barrel bore of a shotgun in which the slug assembly is to be used. The plunger and annular flange are coaxial to each other. The plunger cooperates with the cavity of the slug to maintain a distance between a rear end face of the slug and a front end face of the annular flange of the stabilizer at a predetermined value.
A training projectile that utilizes flutes or flats to augment roll damping characteristics and thereby cause the projectile to crossover into a gyroscopically unstable trajectory pattern at a predetermined time. Prior to the crossover, the training projectile maintains a gyroscopically stable trajectory, which enables extrapolation to ascertain the trajectory of a non-training projectile that does not have an augmented roll damping section. The unstable trajectory pattern substantially reduces the distance the training projectile can traverse, thereby reducing the amount of area required for a training range.
An improved sabot bullet for use primarily in connection with shotgun shells which includes a slug having a forward portion which radially converges towards the middle portion thereof, and an outer conforming sabot casing which includes a pair of sabot segments which substantially surround and conform to the outer configuration of the slug. Each sabot segment is constructed to be slightly radially spaced from the slug near the constricted middle portion thereof, and to converge and engage the radially diverging portion of the slug near the forward end thereof, so as to cause the slug to be guided mainly at a point adjacent the front end thereof. Each sabot segment is also constructed to extend rearwardly beyond the rear end of the slug to facilitate rearward movement of the slug relative to the sabot, and consequent outward radial wedging of the sabot segments against the inner walls of the gun barrel, upon firing the fireman.
A shell cap of plastic material has longitudinal depressions (6) arranged in a radiating configuration, and has additional peripheral grooves (7). The depressions 6 and peripheral grooves 7 form a grid which provides improved bursting certainty.
A projectile having a cylindrical slug with a forward end portion and a rear end portion having substantially the same outer diameter. A sabot surrounds the slug and is nonrotatably connected to the slug so that the rotary motion which is imparted to the sabot by contact between the external surface of the sabot and rifling in a gun barrel is transferred directly to the slug by the nonrotatable connection between the sabot and the slug.
