Volley fire was rather limited and not particularly liked as the loading drills where slower and more involved than later and infantry did not like to be caught unloaded, especially in the open by horse, when their only protection was a bayonet which stopped you shooting back, or a handful of pikemen. I am coming to the opinion that any thing like later volley fire would be limited to troops in a defensive position and the start of the fire fight and then only by troops of reasonable quality.
I also rather get the impression that moving a line once it was in a fire fight was a bit of a task for its officers
I however expect to be educated about this by more learned fellows on the forum.
Ginger