i had a lot of mirage today while shooting. My 6” target became a blur at 700 yards. The target was a green sticker stuck on a cardboard box. What should I be aiming at and realistically expected a hit? Or, what is my best chance for a hit at longer ranges? Should I be using an 18”x30” target because of the mirage? It’s difficult for me to focus that 6” target at 27x with so much distortion. Any tips are appreciated!