It is not a zero stop, but you could see how many revs it takes to bottom out and if you get lost you can always take it to the bottom and go back up.
That's true and thought about that too. I did order a 20 moa rail (didn't want one as trying to save weight and keep optics as low as I could and simpler, plus didn't need one) and some Burris signature rings with the moa *** align inserts. I thought I could get it close to bottoming out trying different configurations till I got close, and that would make it easier to count down if there were minimal revs, or only a partial.
I know it's best to view a scope more in the center but trying to be creative here. But then again I may just use my Zeiss scope (turrets with rev. Counter) instead on the rail with ARC rings already on it since I have it freed up currently, just much heavier and bulkier.
26, there is no bearing on the factory turret so it spins the full 7 revs, and Some change of moa.