電車難題
2019-8-25 00:08:05
Hollow-points, or more generally “engineered expanding ammunition”, has several advantages to police:
Increased “permanent cavitation" (bigger hole, more tissue damage) from the increased diameter and possible sharp edges of the expanded round.
Better energy transfer into the target, with less chance of “overpenetration", due to the increased frontal area and decreased dynamic profile of the bullet.
Smaller, faster bullets (e.g. 9mm Luger) gain more from the technology, allowing these bullets to be much more nearly as effective as larger bullets while retaining the advantage of being easier to control in rapid fire or by smaller-framed shooters.
Hollow-points are statistically more survivable, in part because they're more effective at incapacitating their target. ER doctors and trauma surgeons used to hate expanders (the whole “Black Talon" backlash in the 90s was led by the medical community), but once they figured out how to remove the bullets without further damaging tissue in the wound channel, the doctors realized that their GSW patients were surviving more, because they had fewer extra holes in them due to the expanding rounds requiring fewer hits to stop a fight. A person who made it to the hospital alive after being shot had really good odds of staying that way.