The first thing I would do is examine the rifle myself. How did the rifle land when you dropped it? My initial suspect would be a dinged crown. A damaged crown will wreck havoc on accuracy but an easy fix. It could be something with the bedding of the action. Remove the action from the stock then put it back in and snug up the front action screw. Now push down on the rear of the action. If you can feel ''slop" then you need to have it rebedded. (I really doubt this is the issue from one drop).
And bending a barrel is almost impossible from a drop. I had the wind slam a pick up door shut on my 700 barrel and it didn't phase it.