Bob, it's 38 years since I fired a rocket, and it was only a FFFFFAR (fixed forward firing folding fin aerial rocket) of 2.75" diameter, launched from a Huey with the hope that the relative airflow was straight down the tube and that the tube was pointing the right way, the correct depression was set, and the old orange-painted armoured car on the ground was a willing participant.
We never missed the ground.