Originally posted by: Triumph
Originally posted by: gorobei
Originally posted by: Triumph
Instant incapacitation is caused by severing the nervous system. People's opinions are swayed by the movies, they think a 45ACP will throw someone through a plate glass window while a 9mm will bounce off of their jacket. It's all bullshit. People are just like zombies, aim for the brain and they'll go down.
uh, no.
bullets don't sever nervous systems. the kinetic energy of the round hitting tissue and transferring that energy to the surrounding tissue creates an overpressure wave in the tissue which triggers a massive response in the pain receptors. the massive and simultaneous input overloads the brain causing the "instant" incapacitation. it is a temporary effect that can be affected by sympathetic nervous response/compensation.
Ok thanks for that confusingly worded method of saying, "a bullet pressure wave needs to sever the central nervous system connection for guaranteed instant incapacitation." So aim for the head or neck, and either the bullet severs the spine, or the pressure wave severs the spine.
The FBI report also emphasizes that unless the bullet destroys or damages the central nervous system (i.e., brain or upper spinal cord), incapacitation of the subject can take a long time, seemingly longer if one is engaged in a firefight.
Failing a hit to the central nervous system, massive bleeding from holes in the heart or major blood vessels of the torso, causing circulatory collapse is the only other way to force incapacitation upon an adversary, and this takes time. For example, there is sufficient oxygen within the brain to support full, voluntary action for 10-15 seconds after the heart has been destroyed. (3)
More often than not, an officer firing at a suspect will not immediately know if he or she has even struck the target. The physics are such that the body will rarely involuntarily move or jerk, and usually there is no noticeable spewing of blood or surface tearing of tissue. Often there is no blood whatsoever. (4)
So much for instant incapacitation via "pain."
http://www.policeone.com/patro...ndgun-knockdown-power/
um. still no.
you need to work on your reading comprehension.
Nothing is being severed, certainly not the nerves or spinal column. The one shot stops I'm referring to are instances where one or two rounds of a "performance" JHP is fired and the target is sufficiently traumatized that they cease to be able to do whatever it was that made them a threat in a reasonable amount of time. (this is the general criteria of most departments when it comes to choosing a duty round.)
The current generation of JHP (hydrashok, corbon, rangerSXT, golden sabre, starfire, what have you) are all designed to expand and cavitate to transfer all the KE to the tissues of the organs in center mass. They all seek to over stimulate the pain receptors in those tissues to overload the brain and cause "blackout" or incapacitation. These designs are intended to avoid relying on hitting those special "magic" targets in the body that cause the perp to drop instantly (ie the spinal cord, brain, carotid, or aorta) due to instant death. Rather they are trying to incapacitate by relying on the overpressure effect on the brain. They merely need to hit the tissues in center mass (the largest and easiest to hit part of a human silhouette). They are not seeking to cut any particular
nerve.
the article you link to is an editorial where a long beach PD detective criticizes the the FBI report you quoted for its lack of reliability/practicality and asks for better research into the effectiveness of defensive rounds punctuated by an anecdote about him using a .45 long colt back in the '80s and taking 5 rounds to drop a perp.
my response to your post was to correct the mis-information of your "sever the nervous system" statement. I and certainly no one else cares about the mechanism of how a headshot stops a perp.
Headshots are typically unreliable and low percentage in terms of being able to make. There's a reason why the mozambique drill is two to the chest and one headtap.