When I go to a range, I usually fire off the magazine in my carry pistol to replace the old ammunition with fresh. With the 1911, I am always surprised when my target gets illuminated with a red dot. I never remember about the laser until it comes on by itself. Should be handy if I ever have to use this gun for real.
Yesterday, I carried a lighter Kahr P9 out of sheer laziness. No light or laser, just a very accurate compact pistol. I tried shooting it against a large sheet of cardboard at 50 yards and was surprised to find a centered 6″ group. I was even more surprised that I concentrated on my aiming and lost count of the shots fired. Imagine my surprise when one of the shots streaked red towards the target. Tracer! The slide was still forward, so this was the time to reload. I fired one more time and the slide locked open. I completely forgot that I got into the habit of loading tracers for the last two rounds of carry magazines just to let me know when it’s time to reload.
If my mind got so single-tracked from just concentrating on aiming, I am pretty sure that round count won’t enter my mind in case of a real emergency. Having a visual reminder helps, and also provides verification of my aim.