| CPC F42B 12/44 (2013.01) [F42B 12/06 (2013.01); F42B 12/78 (2013.01)] | 19 Claims |

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1. A projectile for an ammunition cartridge, comprising:
a jacket defining an internal volume and having a closed base end and a nose end;
a penetrator shaft at least partially enclosed within the internal volume of the jacket and extending from the closed base end toward the nose end, wherein the closed base end has a means for engaging the penetrator shaft; and
a core disposed within the jacket and around the penetrator shaft, the core having:
(1) a stable region composed of a first material and formed proximate the closed base end and extending forward to an intermediate location, and
(2) a thermal region composed of a second material, the thermal region extending forward from the intermediate location toward the nose end, wherein the thermal region is configured to ignite upon impact with a target.
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