Our next category, expanding bullets, include softpoint, mushrooming, and hollow-point rounds, all designed to increase in diameter after impact and thus deliver far more energy into the target than a ball round does. These rounds also are called hunting or dumdum bullets.
In the illustration at left, I've noted that an expanding bullet delivers roughly 70 percent of its kinetic energy and loses that much velocity, resulting in less danger of overpenetration. And because this wider projectile presents a larger surface passing through the medium, the resulting permanent wound channel inflicts more damage and has a greater likelihood of passing through critical organs or nerve tissue.
Expanding bullets were ruled illegal for use in war by the Hague Convention of 1907, although they may be used in counterterrorist and law enforcement operations.
The wound ballistics section addresses the Sierra Match bullet's terminal performance, but we must note here that it is not a true hollowpoint and thus breaks up on impact but does not expand.
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Deer hunting is an interesting thing that reminds you of those golden old ages of 19th centuries, where a handsome hunk well equipped with all hunting material rides on horse searching for his target animal either for the purpose of displaying his masculine powers or for enticing and wooing his lady love.