I'm using a Leupold with turrets and have had no problems so far. I've been carrying the scope set at 250yds, but in low light conditions it's was hard to verify it had not somehow moved. So, I put a dab/dot of white paint on top of the turret at the 250yd mark. Problem solved.
That works. The foolproof way IMO is the set POI zero at MPBR, which is probably 3" high @ 100, which is the way I hunted before a yardage/MOA dial was ever even though of. In my case for one of the 7mags zero at 260, out to 340 I"m on hair, therefore I don't have to screw around with spinning a turret unless I have plenty of time, just want to shoot a hog,'yote, rock, or whatever way out there.
