So I'm thinking about getting an Ibanez GRX20 and it would be my first guitar with a tremolo on it. Anyway, right now I use Ernie Ball .9's to play mostly just standard tuning, but I want to start getting more distorted sounds since I'm first and foremost a metalhead. Anyway, with the tremolo added, do I need to get heavier strings to play in Drop C? I've never played in Drop C before but now I want the kind of sound Don Donnegan has.
I think for drop C you need 11's or 12's or some 12's hybrid gauge. Just know that with a tremolo you can't just tune it up and down. It has to be kept in the same tuning all the time.
I tune my guitars to drop C, and I use 10's. They work fine for me.