I don't know the answer but there is another way to dry out the sound of your snare.
If your due for snare wires I would start there. I believe the copeland comes with 20 strand maybe you can replace with 24.....42 strand wires. Just a suggestion.
Maybe a snare side die cast hoop will dry it out too much and you may not like it. Maybe someone else can chime in that has experimented down this road before. I have Mastercast hoops top and bottom (stock) on my Pearl Sensitone Classic II Brass and its the same shell thickness as your copeland 1.5mm but nickel plate over brass and 24 strand wires and it sounds perfect to me.
But who knows how that will manifest itself on your copeland. Heres an example of the Pearl Sensitone Classic II brass snare with Mastercast hoops and 24 strand wire.
http://www.youtube.com/watch?v=Daf3GydX-6A
Is this the sound you want or is it too dry? Yes there are other factors at play in the recording but it does give a general idea.