This is correct. The top face of the shell holders are all the same so the die will bump the top of all the shell holders the same if set that way. The base of the case moves down the indicated distance.Are you certain? I do believe the Redding competition holder are sized 000, +002, +004 and so on. This measurement doesn't increase the overall height of holder, but just where the case head sits from ram face reference. This is what I was told anyway.