A Wyatt's gives 3.82" COAL..... Is that sufficient?
You could certainly go with a Wyatt. I wanted to seat the 300 SMK out far enough to allow the boatail to be located at the shoulder neck junction in order to avoid the need to turn necks because of the doughnut formed there by resizing. Without seating far enough to get the boatail in this location uneven neck tension is created unless one turns the necks. I wanted it simple but effective.
