The natural temptation in DB is to pull the stick back immediately after release. In the real world this may work with a high accuracy rate (with good aim), but in a simulator things are different. I had to learn in CFS2 to aim as in a near vertical strafing attack and hold that same angle of attack for a minimum two seconds after release is what works best, no matter what mount i fly. The ordnance weight algorithm is not perfect, so the bombs follow the flight angle of your plane a second or two longer after release than in the RW before gravitational weight kicks in and affects the trajectory. If you pull out too fast, the ordnance follows your pull just enough to land a bit long of the target. but if you hold the AOA longer as if doing pinpoint strafing, it ensures a higher accuracy rate.
I sort of picked this up by accident some years ago after reading more about how WW2 pilots used their guns to aim in DB. This naturally forces the pilot to hold that aim longer for effective bullet hits before pulling out. Once i started doing this routinely, my accuracy automatically improved as well, no matter what i was flying.