If you pay attention to the way most pros shoot instead of watching the CB hit the OB you will see that they all drop their elbow a little during the follow thru but everything else stays motionless. Their elbow does not drop before CB contact. This is most noticable on shots that need the CB to travel.
I think the main thing is not to drop our shoulder. Don't confuse elbow drop with shouilder drop.
I think the main thing is not to drop our shoulder. Don't confuse elbow drop with shouilder drop.