Jacketed one piece core ammunition
AssigneeGeneral Dynamics Ordnance and Tactical Systems - Canada, Inc.
InventorJohn MacDougall
Life of this patent
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Abstract
A jacketed projectile having one-piece steel core provides good performance regarding chamber pressure, barrel wear and accuracy by separating the jacket from a central tapered portion of the core by providing an encircling air gap that facilitates engraving of the jacket during firing.
Claims23
A jacketed projectile having front and rear ends separated by the length of the projectile and comprising:
- a) an engravable jacket, and
- b) a central core, the central core having a midsection portion which is not in continuous contact with the jacket over at least a portion of the midsection portion to allow engraving to occur on the jacket without full support from the core,
- wherein the midsection portion is tapered, tapering towards the front end of the projectile to allow for progressive engraving of the jacket when the projectile is fired through a rifled barrel.
A projectile as in any one of the preceding claims wherein the midsection portion is frusto-conical in shape.
A projectile according to any one of the preceding claims comprising a short cylindrical portion of the core having an outer surface, the cylindrical portion extending rearwardly from the midsection of the core, wherein the jacket and outer surface of the cylindrical portion are in generally continuous contact with each other for the length of the cylindrical portion.
A projectile as in any one of the preceding claims wherein the central core is principally composed of a material selected from the group consisting of carbon steel, tungsten, tungsten carbide, tungsten alloys, tungsten-nylon compounds, tungsten-tin compounds and mixtures thereof.
A projectile as in any one of the preceding claims wherein the jacket material comprises gilding metal.
A projectile according to any one of the preceding claims in combination with a casing to form a cartridge, the casing being dimensioned to fit into a standard firearm wherein the overall length of the projectile is greater than that of a conventional ball projectile of similar caliber and wherein the projectile, when fitted into its casing, provides a cartridge with a length suited to fit into a standard firearm having a casing of the same diameter.
A jacketed projectile as in any one of the preceding claims wherein the central core is a solid, one-piece core.
Dependencies are inferred from the claim text.