Thanks for the tip Jimmer460
The other day I actually picked up some RSC chain for the 20" bar. Was looking for RMF but they didn't have any. Didn't even have normal RS or RM for it either, and no spools so they couldn't make any. Everything came in pre-packaged boxes. (a new shop I was checking out)
So I ended up with the RSC....and I was wrong. It DOES have less vibration than the RS (go figure huh?) Pretty smooth stuff alright.
Even when I touch up my chains I still don't get that "new edge" feeling back, so I'm thinkin about getting the bench grinder chain sharpener now.