Just on the 3x3x3 rule, or average. First if someone can find the original FBI or DoD report that says that it would be helpful.
Second, it is more likely 3 yards than 3 feet. On average more gunfights occur at 3 yards and under than at 3 feet and under.
The 3x3x3 deal is that most, on average, gunfights occur involve 3 shots or less, take 3 seconds or less, and are at 3 yards or less.
Folks really think it's at 3 feet or less? 3 feet is where you can lean out and touch someone. At that distance or closer a knife is a much better weapon than a gun. The average of that would mean that 1/3 of "civilian gunfights" would involve people at tango distance, hugging. You think that's the case?
I don't think that there is an official source, reliable statistics, for that 3x3x3 view, either yards or feet. I suspect a gunwriter or trainer thought it up and popularized it.
Here's one of the FBI reports it's supposed to be based on. The annual Officer Killed Summaries available at the FBIs website...
http://www.fbi.gov/fbi-search#outpu...loniouslykilled.html&q=officer+killed+summary
I also include here two articles discussing the reports...
"How many bullets do you need in your home defense handgun"
http://www.thetruthaboutguns.com/20...ets-do-you-need-in-your-home-defense-handgun/
and "What do FBI statistics really say about gunfights?"
http://www.personaldefensenetwork.com/what-fbi-statistics-really-say-about-gunfights/
The other source for much information is the analysis Claude Werner did based on 5 years of articles from the "Armed Citizen" column of American Rifleman. In that report he says...
The range of most incidents appears to be short but in excess of touching distance. It appears that most defenders will make the shoot decision shortly before the criminal comes within arm's length. Defenders frequently communicate with their attackers before shooting.
Just past 3 feet or further. A link to that article...
http://thinkinggunfighter.blogspot.com/2012/03/self-defense-findings.html
Both sources have their flaws. One deals with police shootings and only those where officers died, the other only shootings where the defenders were successful and excludes those that are domestic disputes and others. The American Rifleman column routinely excludes a number of shooting incidents.
None of this tells you anything about carrying a reload. But it is useful to have some facts. You oughta carry a reload but it's got little to do with gunfights.
tipoc