I think the V1 was not ballistic. It was kind of a primitive cruise missile. The RAF actually had some success with shooting the V1 down. The scuds were ballistic, though certainly inaccurate. I think all ballistic missiles essentially fall from the sky when their fuel runs out. The sophisticated targeting comes into play both during ascent and descent through the manipulation of the fins. Probably the scuds were just aimed at launch with no in flight adjustment.