| 摘要 |
The present invention is a controlled expansion projectile ( 20 ) having a bonded rear core and includes a metal jacket ( 22 ), a dense core ( 24 ), and a tip ( 26 ). Metal jacket ( 22 ) includes a nose portion ( 28 ), a middle portion ( 30 ), and a heel portion ( 32 ). Nose portion ( 28 ) includes a front cavity ( 34 ) and heel portion ( 32 ) includes a rear cavity ( 36 ) defined by sidewalls ( 40 ), an open end ( 42 ), and heel ( 44 ). Dense core ( 24 ) is typically formed from lead but may be formed from lead compounds or other heavy metals. Dense core ( 24 ) may be enclosed in rear cavity ( 36 ) using a closure disc ( 48 ) joined with heel ( 44 ) to seal open end ( 42 ). Dense core ( 24 ) is joined with sidewalls ( 40 ) thereby forming a bond ( 52 ). Bond ( 52 ) may be a metallurgical bond ( 54 ), a mechanical bond ( 56 ), or an adhesive bond ( 58 ). Tip ( 26 ) is at least partially inserted in front cavity ( 34 ). Sidewalls ( 40 ) of rear cavity ( 36 ) are softened during either a metallurgical bonding process or other processes.
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