Is there a need to adjust when shooting downhill? I hunt NW Missouri and am ground hunting on top of a bluff. I would guess its a 30ish degree slope. I have missed 2 times in a row now, different days. Also, I am able to rest on a fallen tree so I have felt good about both shots. I would say the shot distance is 80 to 100 yards. Should I be aiming differently when shooting downhill like this? Thanks!