I use the the last method that brian mentioned. I size the case neck and changer it well and force the bolt closed on the cartridge. I do this several times to get an accurate reading. Then seat the bullet an additional 50 thousandths or. .050. This has worked very well for me. Also all my cases are Winchester fire formed then neck sized.
Not that it will make a difference for you but my coal is 2.785 and that is. .050 off of the lands.