why is gunnery so much more difficult in clod than in 1946?

[Plt Off JRB Meaker]

I actually think they've got this right,especially the British aircraft anyway,it was difficult to bring down German aircraft especially big bombers like the Do17,Ju88 or Heinkel 111.

I am currently reading a book about the exploits of 249 Squadron and it states in there numerous times,that when using British 303 rounds one seemed to have to empty a whole aircraft's ammunition into these beasts before they'd go down.

However I am lead to believe that the cannon round used in German aircraft was much more favourable when shooting down aircraft.

But as a whole I think the authenticity in COD is just about perfect.