As a new participant w three matches I can tell you. To me there's a lot mentally happening, counting rounds, noting all the targets, even thinking of the 180. This weekend I missed engaging three targets over two stages. One I just plain overlooked under stress. The other two I planned and when the plan fell apart I didn't get back to them. Not pretty but there's only one way to go from here.
In the first two matches I didn't miss engaging targets, but as I try to increase speed this happened. I have to go slower and let speed develop. There were a couple masters in my squad that were good to watch but I think pushed my speed too quickly.