I was taught to shot on 5x when I was little and, many years later with a lot of optics riding rifles, I still shoot more often than not on 4-5x. That’s for anything from 100-400 yards. Most of my first optics were 3-9x. I’d use 9 to judge a deer and crank back down to shoot. About the only time I vary my choice is for long range target shooting or when hunting thick, close brush with a 1-4, or 1-6 set to 1x so I can shoot both eyes open.