i think the consistency of the curve of the ogive has more to do with consistent seating depth than anything else that is as long as you are using a quality seater like the wilson. measuring tools and seater stems catch that ogive at different points. as long as the curve is consistent the the measurements and seating depth will be consistent.
the higher quality the bullet the more consistent that ogive will be.
the higher quality the bullet the more consistent that ogive will be.