The spec is total elevation from bottom, are you starting at the very bottom of the erector assembly (is the turret bottomed out, not just a .5 mil past the zero stop)? Also each rev is not 10 mil, look at the numbers on the baselines and you will see.
That is probably because there is an indicator for the 2nd revolution (the push button for the ZS goes flush), and one for the 3rd revolution (a silver button protrudes from the top of the turret).
my mark5hd is sitting on a 20 moa base on top of a bergara hmr pro 6.5creed. From zero I have 28 mils of elevation to play with. that's on the third set of numbers
zero