I baught a Z6i 5 30 50 and I couldnt get on with it.
It wouldnt come to the eye quickly (I am sure you know what i mean) and the max power settings were virtualy useless on anything but perfict days with perfict light and no haze, mist or rain.
At any where near full power forget sticks and most high seats you realy need prone and a bipod to get the best out of it. All it does is make you realise how much your heartbeat twitches the scope
Also do not underestimate how big and heavy a 5-30 scope is
On my other rifel I had a Z6i 2.5 15 56 BT and that is an absolutly stunning scope in every way except it is still quite heavy.
SOld the 5 - 30 -50 and baught another 2.5 15 56 BT and now I am very happy
Range wise? 300m+ no problem with a X 15 if you killing fox or going for a heart shot.
If your punching holes in paper and want a tight group the 30 would be better over 250 but below that I still find it shows me enough of the target to pull off good groups
If your shooting 500m + open hill with plenty of time to set up get relaxed and take the shot, then I can see the advantage
If you ocasionaly shoot v shot range woodlands or simila the I found the 5-30 even wound down to 5 was dificult to use
ATB
Chasey