According to Badger if you look at the dull end of the needle there are grooves cut into it. One is fine, Two is medium, Three is heavy. With that said, Badger also makes two different 200 AB's. One is 200 detail, the other is the 200NH.
The detail 200 would probably not work very well with metallic paint. I use all kinds of paint thru my 200 NH, and it works like a dream.
I hope this helps you better determine which A.B. you have, and gets you where you want to be with your Airbrushing.