I am not sure at the moment, but after some flights attacking 2 seaters I´d say their acuracy is way too high,...Dead or heavily injured every single mission, I know I am a bad pilot, b...well, even a Fe2 can kill my Alb D.V easily now,..
In Workshop, do you have Rear Gunner set to Inaccurate?
I haven't noticed much of a difference between the two settings. Every bit helps, I suppose.