That's quite correct lonewulf.
Each rifle is different so trial & error in respect of bullet seating depth is the only way forward.
For example I have never found a Nosler bullet work well in any of my rifles with bullets seated close to the lans. They all like a 'jump'.
Currently in my .25-06 the seating of an Accubond bullet is .045" from the lans.
Other rifles will likely be different.

I'm just agreeing with kiwibloke that the best way to measure a round accurately is with the use of a comparator, measuring from ogive to case head. Not making any suggestion on where a bullet should be seated.