Id like to build that muscle memory for rapid target acquisition. I know that if someone was shooting at me I wouldn't stand still that's for sure, I'm guessing if i had to shoot at someone that would probably be moving not just standing in one place like a static target my 2 cents I guess 
We use 3 target stands each with the same 3 colored pieces of paper but with each color in a different position.
i:e.
1st target top blue, middle red, bottom yellow.
2nd target top yellow, middle blue, bottom red.
3rd target top red, middle yellow, bottom blue.
Assistant calls color and position.
Great for horizontal, lateral and specific target recognitio/acquisition.
Under pressure, it can be a speed/accuracy challenge.
