The reason the "ground" debate doesn't have good legs is that only doubles at station six would usually bring that rule change into effect. Low house targets rarely hit the ground on the field before being shot at and most shooters in windy conditions shoot at high seven doubles in plenty of time because they change their timing on the low bird to allow extra time on the second target. That only leaves the second bird of station six doubles to worry about. The law of averages would make a grounded high six doubles a rare event except in a tornado.