I use this scope exclusively. I can reliably hit 700 meter shots with it.
My question is do you change sniper rifles, switch supressors on and off etc.
Also shooting through cover even leaves can effect bullet drop and travel distances. Might just be my mind playing tricks.
Though in all honesty this scope with the HTI allows for some very sick long range shots. So far in fact that even if a shot is missed often at extreme range for Ai to find you helicopters just cycle the base and as long as you remain prone in some cover they won't find you let them calm down and resume clearing. It's a little tricky at these ranges though you have to use a 3x zoom drone with max range and battery. Find an enemy mark them then quickly drop the drone aim in before you game refreshes your draw distance.
You have a 3-5 second window to see something at 700+meters before it disappears.