.1 is fine, but .7 is a bit much for 1st round hit expatiation. and yes the wind is a factor 600 yds away - but at least need an accurate elevation to start.Zero weather, bore height, DA, something... there's a variable that's off.
They'll never line up dead nuts, but they'll most always be within a 10th or so in my random experience.
Protip: Fastforward some brain damage. Start using the kestrel, true it to your gun/ammo, and never look back.
Pick one tool. Use it.
Thanks for the reply!