I think the notching effect on the m2000 is a bit aggressive. The target is only inside the doppler filter for maybe a second and lock is broken. In reality I'm sure there's a memory that will allow the radar to search the space for where the target can be (can only move SO fast), and pick it up again automatically, but in the sim, the 530 is trashed and you need to fire the other one. I basically never fire as far as 18nm, on Blue Flag everyone is on Fox 1 so I know I can wait until 6 or 8nm before firing, in a head-on M2+ merge. Lock breaking is the cause of 90% of misses I would guess.