I have Leupold 6x42's with the LR Duplex on both a .270 and a .340. Although I haven't tried them past 400 yards so far, both are right on up to that range when sighted according to the directions. In a variable, the dots are "on" for range only at the highest power.
I like the LR Duplex and it is very fast and effective in the field. You can't spin it the wrong way by mistake, either.
Last edited by wildhobbybobby; 08/26/11.
