Jeepnik makes a valid point for SOME types of potential armed encounters. The "wait & ambush" is still a very valid type of SD & such.
Sadly,, not always what's needed.
You are home, you have kids, you hear the kids screaming for help. You hear a thug in their room.
You are a parent picking up your kid at school. Your kid hasn't come out yet. You hear gunfire & see a thug shooting at kids. He's moving towards where your kid may be coming from.
You are at the local store, you have your family with you. You hear & then see a thug shooting at people, and you know your kid or wife or whomever is near the thug. You see the thug moving towards your family, yet he gets out of sight around a shelf.
My point is,,, SOMETIMES,,,,,, ambush tactics won't be the better option.
Blume has seen what I can do with a bit of movement & shooting, and at "speed." Yes,, he is correct,, his hits are quite good in the very center mass. But he's also a lot slower, and with less movement than what I apply.
To clarify one of his comments,, I don't set up a "combat course" I just have a USPSA stage set up. And not even a very technical one either. I keep them simpler for the Gathering folks.
USPSA style competition combines accuracy, speed, movement, reloads, and most importantly,, STRESSES SAFETY! Any movement done,, while NOT engaging targets is done without the finger in the trigger guard. You are allowed to move & engage targets at the same time. The muzzle is always pointed "downrange" and we have a "180 degree" rule. The muzzle is never supposed to point past the 180 degree line of the stage. And there are also rules about muzzles downward & upward. You can do so,, but it's stressed that if the muzzle is up, and a discharge happens,, the round leaves the range & a DQ happens. If you allow ANY part of your body to be ANYWHERE in front of a muzzle, DQ. I have seen several DQ's because a competitor drops a magazine, and while they do point the muzzle downrange towards a berm,, they reach for the magazine, and it's forward of the muzzle line. No, the muzzle isn't pointed at the body, but the hand is forward of the area in front of the muzzle.
I use USPSA competition to hone skills that allow a shooter to put themselves in conditions they normally do not practice much. Mandatory reloads, weak hand only shooting, unloaded starts, targets in positions that allow for movement by the shooter, moving targets, transition types of scenarios, (Paper to steel to paper to steel to paper to steel, etc.)
USPSA isn't perfect for all types of potential street encounters,, but it does allow a shooter to work on skills well beyond just standing at a table or on the line & punching holes in paper. And with the rules we are required to follow,, it's quite safe.
And with USPSA competition, you can get the occasional stage built similar to the style kmoore is discussing. We don't yell or anything at a shooter. You are allowed to stop & shoot, but your TIME will reflect this and affect the score.
If two shooters do the same course of fire,, say,, like Blume & I, and let's say both of us have the same exact scoring points on a target. The faster moving shooter will be the stage winner because his time is factored in the actual score. In USPSA,, this scoring is called "Hit Factor." And quite often,, a shooter can have fewer target points,, but a faster time,, and be the winner of the stage. Hit factor scoring is a method of judging overall performance.