If you haven't used the Stoney Point gage you need to. I did it for years the old way and it's a pain in the butt when loading many different bullet types. When used with a Sinclair bullet comparator you can set the bullet an exact amount off the lands. When using magic markers, lipstick etc. you are just guessing. I also use a Redding micrometer seating die on all my precision ammo. If I want .020 deeper I just dial it in.