I fired on a player flying a box of 2 Ju88s his I was hitting the center aircraft and the left also started taking damage. I have earlier made a high speed pass on a full set of B24s and destroyed 2 and damaged one in that single pass, I didnt see where my tracers were hitting as it was under the nose but I'm pretty certain I didn't actually score hits on all three.
I think the bomber drones are all taking the damage when only one is hit.