Yea I don't really see the point in it as I'm definately gonna know if I have dialled a shot out past 20moa and you would have to be the roughest bastard out there to bump the dial more than a half a turn so even if it's out of line it's pretty easy to put it back. As a matter of interest I have been using VX3 and VX6 scopes for a number of years in all sorts of situations and never once had one bump even a click. Have shot at a chamois after forgetting to return the dial to zero though, but that could happen with any setup
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