I have a mildot version of tha 2.5-8 VX 3 on an AR.I agree.its a great scope.
To each his own on the spotting scope,603.
My Kowa works every time at 300 yds.That is the range I sight in,precisely,with my spotting scope.I can keep my shots in the orange diamond of a Leupold target at that range.
All up,WITH the 6x42 Leupold,the rifle I built on a Mex 98 small ring weighs 7 lbs.
It works low crawling through sage and cactus or at 9000 feet.
With a 115 gr Nosler BT at 3050 fps,I get a 100 yd zeroon the upper duplex post,300 yd zero center crosshair,and a 435 yd zero lower duplex tip.
An antelope is in the ballpark 14 in whithers to brisket. Two mils is real close to 7 in.Mildot ranging principle,antelope fits my duplex? 200 yds.Center to post tip? 400 yds.Out to 400,trajectory is good enough,I don't need a laser rangfinder.
I can interpolate from there.
I've been shooting it as my main hunting rifle 25 years. It works.
Not one animal lost with that rifle.
Exit pupil 7mm.Gives all the light the human eyeball can accept.
Compact,light(compared to larger variables) .Has not failed me in 25 years.
And everything in the view is exactly the same,every time.