templaq.
I use it to set up my torch. Depending on your setup you need the brass to dwell in the flame long enough for it to get to temperature. For the second half of your question, The reason for the water is to prevent heat soak. If the process is fast enough with the heat concentrated in the right place you may not need to drop it in water.
If the heat does soak into the web then the brass gets too soft and the result can and will be catestrophic to some degree. When the brass is formed it is work hardened in that area and is critical for it to remain that way.
It has been my experience that this process is critical for accurate loads with brass that has been fired several times. Someone please correct me if I have given any bad information.
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