That's another way too. I just recommend using gages and getting actual measurements because its hard to tell how much you're actually adjusting. You don't want to be sizing too much and run the risk of stretching your brass so much after 3 firings your case heads are separating. Just adjust in very small increments. Every 5 degrees of rotation gets you about .001" change in the shoulder length (headspace). You shouldn't need more than 2 or 3 thou or you're doing too much.