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An armor penetrating round includes an elongated core portion (e.g., a hollow tool steel core) defining a front end, an aft end, and a central cavity which extends from the aft end toward the front end. The central cavity has (i) an aft cross-sectional diameter adjacent the aft end and (ii) a front

An armor penetrating round includes an elongated core portion (e.g., a hollow tool steel core) defining a front end, an aft end, and a central cavity which extends from the aft end toward the front end. The central cavity has (i) an aft cross-sectional diameter adjacent the aft end and (ii) a front cross-sectional diameter adjacent the front end, the aft cross-sectional diameter being larger than the front cross-sectional diameter. The armor penetrating round further includes a slug portion (e.g., a pre-compacted pellet of powdered metal) which is disposed within the central cavity adjacent the aft end, and an outer jacket (e.g., a copper jacket) which extends around the elongated core portion to operate as an interface between the armor penetrating round and a gun barrel when the armor penetrating round is fired through the gun barrel.

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1. An armor penetrating round, comprising: an elongated core portion defining a front end, an aft end, and a central cavity which extends from the aft end toward the front end, the central cavity having (i) an aft cross-sectional diameter adjacent the aft end and (ii) a front cross sectional diamete

1. An armor penetrating round, comprising: an elongated core portion defining a front end, an aft end, and a central cavity which extends from the aft end toward the front end, the central cavity having (i) an aft cross-sectional diameter adjacent the aft end and (ii) a front cross sectional diameter adjacent the front end, the aft cross sectional diameter being larger than the front cross sectional diameter;a slug portion which is disposed within the central cavity adjacent the aft end; andan outer jacket which extends around the elongated core portion to operate as an interface between the armor penetrating round and a gun barrel when the armor penetrating round is fired through the gun barrel;wherein the slug portion includes powder which is compressed to at least 60% of the crystalline density of the powder; and wherein the central cavity defined by the elongated core portion is configured to accelerate material of the slug portion, upon impact of the armor penetrating round with a target, to a velocity which is at least twice a velocity of the armor penetrating round prior to impact of the armor penetrating round with the target. 2. An armor penetrating round as in claim 1 wherein the central cavity defined by the elongated core portion tapers in a forward direction from the aft end toward the front end to accelerate the material of the slug portion, upon impact of the armor penetrating round with the target, in the forward direction due to a nozzle effect created by movement of the material through the central cavity in the forward direction. 3. An armor penetrating round as in claim 2 wherein the elongated core portion includes a front tip which (i) blocks the central cavity and (ii) is constructed and arranged to be penetrated by the material of the slug portion when the material of the slug portion is accelerated in the forward direction upon impact of the armor penetrating round with the target. 4. An armor penetrating round as in claim 3 wherein the slug portion includes powder which is pre-compacted into a high density body which is constructed and arranged to disintegrate upon impact of the armor penetrating round with the target. 5. An armor penetrating round as in claim 4 wherein the powder of the slug portion includes powdered metal. 6. An armor penetrating round as in claim 5 wherein the powdered metal of the slug portion substantially includes tungsten. 7. An armor penetrating round as in claim 5 wherein the powdered metal of the slug portion substantially includes tantalum. 8. An armor penetrating round as in claim 5 wherein the powdered metal of the slug portion substantially includes lead. 9. An armor penetrating round as in claim 5 wherein the powder of the slug portion further includes pyroforic material. 10. An armor penetrating round as in claim 3 wherein the central cavity defined by the elongated core portion is a substantially funnel-shaped volume; wherein the slug portion occupies a slug volume which is smaller than the substantially funnel-shaped volume; andwherein the material of the slug portion forms a jet which flows through the substantially funnel-shaped volume and passes through the front tip of the elongated core portion upon impact of the armor penetrating round with the target. 11. Ammunition, comprising: a shell;a propellant loaded within the shell; andan armor penetrating round supported by the shell, the armor penetrating round including:an elongated core portion defining a front end, an aft end, and a central cavity which extends from the aft end toward the front end, the central cavity having (i) an aft cross-sectional diameter adjacent the aft end and (ii) a front cross sectional diameter adjacent the front end, the aft cross sectional diameter being larger than the front cross sectional diameter,a slug portion which is disposed within the central cavity adjacent the aft end, the slug portion occupying a volume which is smaller than a volume of the central cavity, andan outer jacket which extends around the elongated core portion to operate as an interface between the armor penetrating round and a gun barrel when the propellant is ignited to fire the armor penetrating round through the gun barrel,wherein the slug portion includes powder which is compressed to at least 60% of the crystalline density of the powder, andwherein the central cavity defined by the elongated core portion is configured to accelerate material of the slug portion, upon impact of the armor penetrating round with a target, to a velocity which is at least twice a velocity of the armor penetrating round prior to impact of the armor penetrating round with the target. 12. Ammunition as in claim 11 wherein the central cavity defined by the elongated core portion of the armor penetrating round tapers in a forward direction from the aft end toward the front end to accelerate the material of the slug portion, upon impact of the armor penetrating round with the target, in the forward direction due to a nozzle effect created by movement of the material through the central cavity in the forward direction. 13. Ammunition as in claim 12 wherein the elongated core portion of the armor penetrating round includes a front tip which (i) blocks the central cavity and (ii) is constructed and arranged to be penetrated by the material of the slug portion of the armor penetrating round when the material of the slug portion of the armor penetrating round is accelerated in the forward direction upon impact of the armor penetrating round with the target. 14. Ammunition as in claim 13 wherein the slug portion of the armor penetrating round includes powder which is pre-compacted into a high density body which is constructed and arranged to disintegrate upon impact of the armor penetrating round with the target. 15. Ammunition as in claim 14 wherein the powder of the slug portion of the armor penetrating round includes powdered metal. 16. Ammunition as in claim 15 wherein the powdered metal of the slug portion substantially includes tungsten. 17. Ammunition as in claim 15 wherein the powdered metal of the slug portion substantially includes tantalum. 18. Ammunition as in claim 15 wherein the powder of the slug portion includes pyroforic material. 19. Ammunition as in claim 14 wherein the central cavity defined by the elongated core portion of the armor penetrating round is a substantially funnel-shaped volume; wherein the slug portion of the armor penetrating round occupies a slug volume which is smaller than the substantially funnel-shaped volume; andwherein the material of the slug portion of the armor penetrating round forms a jet which flows through the substantially funnel-shaped volume and passes through the front tip of the elongated core portion of the armor penetrating round upon impact of the armor penetrating round with the target. 20. A method of creating an armor penetrating round, the method comprising: compacting powdered material to form a slug portion;disposing the slug portion in a central cavity defined by an elongated core portion, the slug portion occupying a volume which is smaller than a volume of the central cavity, the elongated core portion further defining a front end and an aft end, the central cavity extending from the aft end toward the front end, the central cavity having (i) an aft cross sectional diameter adjacent the aft end and (ii) a front cross sectional diameter adjacent the front end, the aft cross sectional diameter being larger than the front cross sectional diameter; andplacing an outer jacket around the elongated core portion to operate as an interface between the armor penetrating round and a barrel when the armor penetrating round is fired through the barrel;wherein the slug portion includes powder which is compressed to at least 60% of the crystalline density of the powder; andwherein the central cavity defined by the elongated core portion is configured to accelerate material of the slug portion, upon impact of the armor penetrating round with a target, to a velocity which is at least twice a velocity of the armor penetrating round prior to impact of the armor penetrating round with the target.