1. Place BLU of RED MEN(SNIPER) SNIPER somewhere on the map in editor (south airport runway will do)
2. Place your target (man) on some disstance, let's say 1,1 km (if you've placed shooter on the south of the runway, place target a little more to the south-west of houses on the hill. Set the init parameter as: this setunitpos "down"
3. Measure the disstance with rangefinder.
4. Zero-up your scope, aim and shoot with the crosshairs right on your target.
5. Watch as your bullet drops before it reaches the target.
7. Suspend mission and swap shooter and target locations.
8. Start mission and repeat steps 4 and 5.