I use the Hornady Comparator. I then cross check with a Sinclair comparator. When I have at least 10 readings, all with .001 of each other, then that is what I use for the seating depth. As for Bergers, there are, according to Berger, two seating depths that work. One is about 10 thousandths into the lands, and the other way out around 80 thousandths or so. The wheeler is too mcuh of pain (for and to me) having to remove the ejector and extractor for every bullet I shoot to get the depth. Then I reload at least five rounds each, in and out in 3 thousndths of an inch, and do a shooting seating depth test on paper. It works for me.