I’m a former basic pistol marksmanship and tactical firearms instructor, and have participated in practical and defensive shooting competitions as well as participating in tactical assault simulations.
First of all, in combat there is no “shoot to wound” or “shoot to kill”; the shooter is shooting to hit a threatening target in the most effective location to stop the threat with as few rounds as possible. Any time a shooter puts iron on a target and drops the hammer, there is a good potential for permanent disabling injury or death, so it is only ethical to do so when legitimate homicide (for self-defense, to defend the lives of others, or prevent a crime of major property destruciton which may result in deaths such as arson). Despite what you see in movies on and on the televisor, there is no way to shoot someone with a firearm which will assuredly not result in death or maiming injury. A shot to the thigh has a good chance of severing the femoral artery which will result in death within minutes
Because most shooters, even law enforcement agents, do not fire tens of thousands of rounds in training and do not train under geniune stress situations, they are generally taught to shoot for the center of mass to endure the highest probability of hitting a vital organ, hip or shoulder, or spinal column, which will disable if not incapacitate an attacker. Note that while a service grade pistol should be capable of achieving better than a 5" circle of precision at 25 meter distance, practically speaking a shooter under stress will be doing well to to stay inside the 7 ring (basically, hit the center torso) at 7 meters. Units trained in special tactics, such as US Special Forces, the FBI Hostage Rescue Team, or major municipal SWAT/SIS teams, may train to hit smaller target areas for a higher probability of immediate incapacitation, such as the head or the hip. I have never heard of anyone training to shoot a hand or foot because these are very small targets at the extent of moving appendages and thus almost impossible to assuredly hit, and may not do disabling damage even if they do.
It is also the case that any bullet that doesn’t strike the intended target in deep tissue will travel onward unimpeded until it hits something else, which may well either be an innocent bystander or riccochet into who knows what. While the fourth rule of safe firearm handling is to always assure that you have a good backstop, this isn’t always possible in a tactical combat situation, so you want to maximize the chance for the bullet to enter and remain inside the target. (This is also the real reason that hollowpoint bullets are used; it’s not that they’re special “killer bullets”, but by remaining inside the target and delivering all of their energy, they are more effective at stopping the target with fewer hits and pose less hazard to bystanders as they will remain in the target body or fragment rather than riccochet.) So shooting at center of mass helps to reduce the hazard to bystanders.
Shooters employing baton rounds (“rubber bullets”) may fire in front of targets in a crowd control scenario to bounce the rounds off of pavement in order to reduce momentum. I have never heard of any authority on tactical shooting advise firing a round with a metallic bullet from a pistol, rifle, or shotgun into the ground in front of a target hoping for a riccochet “just to wound”, and in fact, this would be a patently ridiculous thing to do, since there is no way to predict where the riccochet will go. All this would do is pose greater hazard to bystanders while wasting ammunition and prolonging the attack.
If possible, a shooter should disable a target with 1-2 shots, and in fact the people who taught me drilled in firing two shots into the spinal column or head, with any shot further than 3 inches from profile center considered to be a faliure. However, in a genuine threat situation, the shooter should keep firing at the center of mass (or head, if they are close enough and confident in marksmanship under stress) until the target falls down and stops moving. If the shooter was not justified in killing the target, he or she were not justifed in shooting or even pointing a gun.
Stranger