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US4644866: Ammunition round
19 Claims, No Drawings
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 refling 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.
- 1. An ammunition round comprising: a casing for containing a propelling charge; a full bore diameter bullet which has a plurality of full length grooves in its outer surface extending generally longitudinally of the bullet; and a homogeneous plastics sabot into which the bullet seats and which seals the bullet into the casing, the sabot comprising a body part with a diameter greater than the diameter of the bullet and a plurality of spaced apart fingers engaging respective ones of the grooves in the bullet to cause the bullet to spin as the sabot is rotated by engagement of said body part with rifling grooves in a barrel through which the round is fired.
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