Field guns die modifiers

[dirk]

On field guns, you use the Direct Fire table to resolve combat. My question do you use the modifiers from the Direct Fire table or the modifiers from the Bombardment table for field guns?
I have been using the modifiers from the Bombardment table, due to range that field guns have as an advantage. I just can't see the reduction of fire power (1/2) for field guns at targets over two hexes away.