I guess I'm too cheap to buy the fancy gizmos, but there is a pretty simple way to setup your seating dies, and know the relation between a given bullet and the lands of your barrel. It will cost you one case, and one bullet.
This is the perfect use for range pickup brass. FL size a case, and remove the firing pin assy from you bolt. Set the seater stem way out on your die and load the bullet long in the case. Mark up the ogive with a sharpy. Load the round into the chamber and see if you can close the bolt. You want to be able to get the bolt about 1/2 way closed before feeling resistance. Keep fidling with the seating die to get close, then use your bolt for final seating of the bullet. If you try and use the bolt to force the bullet in often times the bullet gets stuck in the bore. A cleaning rod from the muzzle easily removes it. But once you get that dummy assembled, it will show slight marks from the lands on the bullet and you'll have a great reference for setting up your dies. Keep that dummy and write on it what bullet is seated and what rifle if you have multiple rifles in that chambering.
Whenever you want to set up your seater for that bullet and that gun you simply dial the seater way out, run the bullet into the die, and run the seater down until it stops. Don't crank the seater stem down as you can push the bullet into your case. If you want to start your load work 0.010" off the lands, and assuming a 20 tpi pitch seater, each full rotation of the seater is 0.050", 1/2 rotation 0.025", 1/4 rotation 0.0125".
Even with the wiz bang gauges you still need a dummy to set up your dies quickly.
