I have two, a standard duplex ret on my 97K and one fitted with an aftermarket mildot, on my EV2. I find the mildot one harder to range with. I don't know how much of that is just differences between scopes or if the ret change shifted anything. Certainly the green range marks on the standard one are spot one, but they're a couple of yards off on the mildot one. Then again I've not had as much time to learn that scope.
As above for both I use Sportsmatch adjustable mounts to centre them.