like super_hunt54, can screw in and then out and count
BUT be careful NOT all scopes have a zero stop on coming OUT, and seen many completely remove the adjustments due to they never stopped on way out!
something else to consider, on scopes, is there any dents in the tube from being mounted in rings?
I have seen scope fail from that, or throw things off center to much to have scope allow for adjustment
NEXT will be the screw holes in the receiver ,sadly have also seen them drilled off center on some rifles, to be way out of spec, and then you need adjustable bases to adjust for that!
on windage and elevation adjustments, on many scopes I have seen them hang up and NOT move things , its one of the weakest parts of s scope, and repeatably is the name of the game on quality scopes or NOT in that area as well!