One of our members once made an excellent point about this topic last year. That contributor said he would prefer a semi-auto pistol for offense and a revolver for defense.
Best defense is a good offense.
In any case, though, I think some people are underestimating the number of rounds that may be required.
Good article that's sorta on the subject, by the FBI. One of my favorites to link to, when discussing realistic load choices and capacities.
http://www.fbi.gov/publications/leb/2004/oct2004/oct04leb.htm#page_15
In the authors’ ongoing study of violence against law enforcement officers, they have examined several cases where officers used large-caliber hand guns with limited effect displayed by the offenders. In one case, the subject attacked the officer with a knife. The officer shot the individual four times in the chest; then, his weapon malfunctioned. The offender continued to walk toward the officer. After the officer cleared his weapon, he fired again and struck the subject in the chest. Only then did the offender drop the knife. This individual was hit five times with 230-grain, .45-caliber hollow-point ammunition and never fell to the ground. The offender later stated, “The wounds felt like bee stings.”
In another case, officers fired six .40-caliber, hollow-point rounds at a subject who pointed a gun at them. Each of the six rounds hit the individual with no visible effect. The seventh round severed his spinal cord, and the offender fell to the ground, dropping his weapon. This entire firefight was captured by several officers’ in-car video cameras.
In a final case, the subject shot the victim officer in the chest with a handgun and fled. The officer, wearing a bullet-resistant vest, returned gunfire. The officer’s partner observed the incident and also fired at the offender. Subsequent investigation determined that the individual was hit 13 times and, yet, ran several blocks to a gang member’s house. He later said, “I was so scared by all those shots; it sounded like the Fourth of July.” Again, according to the subject, his wounds “only started to hurt when I woke up in the hospital.” The officers had used 9-millimeter, department-issued ammunition. The surviving officers re ported that they felt vulnerable.
They wondered if they had done some thing wrong that caused their injury or placed them in the proximity of physical danger. They also wondered if they would react differently if faced with a similar situation.
These types of occurences may not be all that rare, either. People do all kinds of crazy things when fatally wounded. I believe the actual statistic is that about 40%-60% of people who are shot will flee, fall down, surrender, or otherwise be
psychologically incapacitated, regardless of the severity of the wound.
Roughly 50/50 are not betting odds. The only way to
definitely stop a threat is to take out the central nervous system. Either directly, with a bullet to the brain or upper spine, or indirectly through blood loss. More holes means more blood loss. More holes also increases your chances of tagging something major.
It might take only 1 round of .22 LR to stop a 300 pound crackhead. It might legitimately take 20 shots of .44 magnum to stop an 80 year old granny who decided to take pot shots at you for no reason.
"Statistics" are irrelevant to choosing a firearm. You want to prepare for the worst scenario you possibly can
without overly inconveniencing yourself, while hoping for the best.
Now, if you do better with revolvers, by all means, go for it. You'd only be handicapping yourself, using a platform you're not as good with. Shooting well always takes priority over number of shots. But don't count on 5, 6, 7, or 8 shots "statistically" being enough. The limited capacity of a revolver
is a disadvantage. Hell, the limited capacity of an 18 shot automatic is a disadvantage compared to a 30 shot EBR.
And regardless of how many shots you have, make
every single one count. The parable of the archer never holding a second arrow in his off-hand is a
lie. You
can shoot just as accurately with a wondernine as with a T/C Contender, if the mechanical accuracy of the weapon is up to it. Concentrate on firing each shot individually. Have the mindset that
every single shot is
the shot that matters, because it
is.