The 5-25 comes in multiple variations. MOA or Milradian. The MOA variation comes in 1/4 MOA (the 12-50 comes in 1/8 MOA). Milradian of course will be .1 mil
As for the turrets themselves, there is double turn as well as MTC. MTC will be a cm (.1 mil adjustment)
CCW as well as CW adjustments are available in each configuration. Locking turrets I believe only come in Milradian adjustments with MTC.
I can be confusing to those that don't know the line.
I think what the original post was referring to was how to reset zero once the scope was sighted in.
So once you have the scope bore sighted, loosen the set screws on the turrets. Rotate back to the "zero" marker. Then tighten the screws back down. Zero the scope at whatever distance and repeat.
Forgot to mention to make sure that the MTC indicator is in the down position when you reset the zero . If it is up, you are on your second turn.