I'm wanting to set up my guitar perfectly with some feeler gauges instead of eyeballing it. I'm in drop C, with Ernie Ball skinny top heavy bottoms. My guitar is an Epi SG G-400 with a GraphTech ResoMax bridge on it. Oh, and my gauges are in metric so if I could get metric measurements that would be great.

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there is no perfect. if it works it works, you might be able to make it work better, but still. eyeballing it is good enough.
Quote by Scowmoo

You deserved this, Matt.
When fretted at the first fret, you should aim for 4/64" on the bass side at the 12th fret and 3/64" on the high side. Measuring this is from the top of the fret to the bottom of the string. From there you can adjust the heights to your preference, that's just a standard in electric guitar action. Also, before doing this, make sure your neck is straight.