Unless you dial away the parallax movement (when you deliberately wobble your head about to see if the cross-hair is moving vs the target) then I say pulling the trigger is a complete mistake. Any dope you write down is skewed with incorrect data. For example you might begin thinking the wind is off, spin drift not right etc etc. Your handheld device (pda, cell or kestrel) is now giving you faulty info. Why? Parallax not being dialed away when you zero'd, and also when you set up for your 800m shot.
IMO you chose well to get an adjustable scope on the side. The AO thing just isnt ergonomic at all - you end up breaking that "took me friggen ages to get it right" shooting position just to reach forward to mess with the front objective lens. Stuff that!
Bookmarks