I just would like to add that my solution is not perfect even to a “first hit only” situation. As Ccd is required to apply precise impulses from fast moving objects and groups are ignored by it, whenever I turn on Ccd, it does its mess by hitting what it shouldnt (by its nearby boundings).
may be the only solution is to apply the force manually on the thing that would be hit,
and redirect the projectile movement manually too, using the hit spot/normal and spending the impulse energy in some way,
basically doing what bullet should be doing but manually,
am I right?