This problem has been around a long time. Back in 1976 Bushnell introduced what they called the BDC (Bullet Drop Compensator) which was essentially the same thing. I was sent one of the scopes with several dials, and used one that worked for my .243 Winchester 100-grain load.
In the field that fall the dial got spun somehow from 200 to 350 yards, probably by taking the rifle out of a case, and I ended up shooting a pronghorn buck at almost 300 yards, on the 3rd shot, when he ran far enough away to get spined after the first two standing shots went over his back.
Of course, the Bushnell BDC didn't have a zero stop--but I did have some black tape, and that's what went around the dial after that.
