What bullets, Sierra seem to like jump, load some .010, .025 and .050 off and see what happens. Berger's seem to like jam or real close to the lands. If your not sure take the Sierra measurements and put some just touching and see me .010 jam. You'll soon figure it out
What calibers has that worked with and what changes did you have to make typically?
I have a 7mm WSM, a .223, and a 220 swift I currently reload for. The swift I haven't had enough time to figure out yet. My 7mm likes 140gr nosler BT seated about .010 off. As others stated I usually just load a bunch of different depths and see which one shoots best. In my experience 10-20 off seems optimal.
Hey, this is interesting. Although I do not have any answer for you I would like to ask the following question.
Why are you concerned with this? Is it a question of accuracy, maybe an attempt to match the measurement of a published or desired number?
Love this reloading stuff, just trying to understand what is driving your basic question. Not trying to be a nudge......
IMO bullet seating depth is one of the most critical factors in improving accuracy with hand loads. It allows you to make ammo customized for your particular rifle as opposed to factory ammo(or Saami specs published in reloading manuals) which is loaded to allow function(not always accuracy) in a wide variety of guns.