CAL has Bamber shooting Nevill/June 9 times. Then going into the twins room.
Again, too much of a head start for Nevill who has already exited the bedroom.
He would only have 2 bullets left for the twins. If he was only planning to shoot them once each, why not shoot them first?
He would also use shots 10 & 11 on Nevill instead of the twins. Nevill was now on the move & a big threat.