try this procedure if u havent already, its from the training and the manual as well i think:
gun depression at 80 (clockwise)
5000 ft over ground
dive in when u see the targets at 10 o´clock
speed at dive in 350-370 kn
release bombs at 1500 ft above ground and speed at roughly 400 kn
dont forget to add the 5000 ft to witch ever altitude your targets are on^^
i dont know if thats the "real" procedure, i think they were faster and steaper on the attack but i have no real life evidence on that.
not sure if u wanted to know this at all actually - but i had such a great time writing this down :D