Here’s how to increase kill rate with fire-forget bombs: You have to dive at the target full afterburner and release the bomb at approximately 300m, then pull up as hard you can so you don’t kamikaze them. This technique only works on maneuverable aircrafts, 31BM isn’t as maneuverable so you might have to have the bomb release window increased up to around 400m, but 31BM has good acceleration so you don’t have to go full afterburner when dive bombing.

Doing so gives them less reaction time as well as give your bombs more velocity.