There's nothing wrong with dropping the brass in water, except the inconvenience of wet brass, but it does NOTHING to the actual annealing process except stop it.
It's not like steel. Brass doesn't care how fast it cools off.
Still happily answering to the call-sign Peetza.
You do not HAVE a soul. You ARE a soul. You HAVE a body.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.