Once again. I'm adding a track from the S-8 launch. 2 km from the target (planes on the runway) I placed smoke. The attack on the target should be preceded by making a hill. I fly to 700 m to show you how the sight behaves. When I'm already at a distance of about 2 km I start diving. Pay attention to the sight, I stabilize the cross on the target and the distance indicator to the target appears. The bold section is the effective distance to the target and in this range the yellow light is on. That's all.
On your replay you are constantly making a slight dive and aiming with the floating grid of the sight. Try to aim with the fixed grid of the sight and make slight corrections to the floating one. I hope this will help you a little in shooting with the S-8.
Raffi75's post in Ranging the s8kom rockets.. was marked as the answer