really. the 2 are only distantly related. I can stop you quite reliably and swiftly, by appying a ball bat across your abs, but barring a rare instance or 2, you will be ok in a day or 2. I can "cause your death" (ie, inflict a lethal strike) by injecting AIDS blood into your vein, but it will probably take a year or more for you to expire from that "wound".
See the difference? it is quite common for a man to expire from a bullet wound (or 6), but FIRST he ran 50 ft or more, or was (and sometimes does) capable of inflicting a dozen stabs, slashes, clubbings, strangulation, or shots fired. He can do those things at the rate of 4x per SECOND, with EACH hand, and if you blow apart his heart, he can still function for 5 seconds, on the oxygenated blood that is CONSTANTLY kept in his cranium. We know this because of timed "choke outs" and beheadings, as well as documented cases wherein 12 ga deer slugs and 00 buckshot blasts to the chest (all pellets striking the man solidly) have failed to stop him.
So, all we can do by our choice of ammo and bullet type is INCREASE the odds of being able to stop a man. Almost any bullet to the chest, even a 'mere" .22lr or .25 ACP, results in his QUITTING what he was doing (not a physical incapacitation) NO chest hit, with any sort of load from a controlable, concealable pistol, is going to exceed about a 95% stop ratio, and only extreme handloads get over 90%. Still, since having to actually HIT someone with a bullet (as vs just show them your "ready" gun, or fire shots that MISS but run them off) is so rare (about one attacker in 1 is makes you actually hit him solidly in the chest) 90% loads suffice.
See the difference? it is quite common for a man to expire from a bullet wound (or 6), but FIRST he ran 50 ft or more, or was (and sometimes does) capable of inflicting a dozen stabs, slashes, clubbings, strangulation, or shots fired. He can do those things at the rate of 4x per SECOND, with EACH hand, and if you blow apart his heart, he can still function for 5 seconds, on the oxygenated blood that is CONSTANTLY kept in his cranium. We know this because of timed "choke outs" and beheadings, as well as documented cases wherein 12 ga deer slugs and 00 buckshot blasts to the chest (all pellets striking the man solidly) have failed to stop him.
So, all we can do by our choice of ammo and bullet type is INCREASE the odds of being able to stop a man. Almost any bullet to the chest, even a 'mere" .22lr or .25 ACP, results in his QUITTING what he was doing (not a physical incapacitation) NO chest hit, with any sort of load from a controlable, concealable pistol, is going to exceed about a 95% stop ratio, and only extreme handloads get over 90%. Still, since having to actually HIT someone with a bullet (as vs just show them your "ready" gun, or fire shots that MISS but run them off) is so rare (about one attacker in 1 is makes you actually hit him solidly in the chest) 90% loads suffice.