Re: zero stop function
If you shoot much at longer ranges, it is just a matter of time before you forget what dope you left on the rifle. If your scope has multiple turns available for elevation (all but a few do), the zero stop allows you 'get back to zero' (100 yards for most of us) without having to try to guess which revolution is the right one. 10 inches off at 100 yards is one thing, 100 inches off at 1,000 yards can be very frustrating, especially when you can't spot the bullet impact. Those of us who shoot long range competition see one or more competitor trying to figure out which elevation revolution they are on at least every other match. Of course having a zero stop doesn't guarantee you won't screw up unless you are very anal about always counting up from the stop every time you get into position. It is easy to get distracted or rattled, even during a sedentary NRA long range match. The likelihood of being distracted/rattled goes up dramatically during 'tactical' matches, and is even higher while hunting. The zero stop is a tool which, when used conscientiously, reduces the likelihood of a 'fog of war' screwup. As a savvy competitor once observed: "He who screws up least, wins."