Tally Ho,
My Z3 has a nice duplex, almost as good as a Leupold. The Z5, on the other hand, had a target type, very fine duplex, too light for hunting where I hunt. I sent it and $125 to Swaro for a 4a retrofit. Not too happy about spending all that, then even more to get what I wanted. Oh well...
My Z5 3.5-18x44 BT is on a custom pre-64, 6.5-284 with 26" Match Krieger. It shoots 4 1/2" at 600 yds, with progressively smaller groups back to teens and twos at a hundred. And the turret is perfectly tuned to the 140 gr. SST loads at 2,950 with Vv 165. I shot it at each distance, recorded the clicks and sent the data to Outdoorsmans. I used the ballistic computer to get on the paper.
Two pronghorns, a number of whitetails and hogs to it's credit, so far.
DF