I thought graphite would be lighter, too, but I no longer have the old wooden bows for comparison (one was crap, the other was OK quality but very badly warped). I suppose I could weigh the one I have--thanks for the gm estimates, by the way--and I'll see if I can track down my old fiddle buddy here and bend his ear.

Or maybe I need to start lifting weights ;-).

Well, like I said--technique issues are a distinct possibility, although I don't really feel like I'm struggling with it and it doesn't feel off-balance at all.