I've done the trip fro Teb to Omaha about 8 times, which is about 100 miles shorter than OKC. We've had varying head winds up to about 75 knots, flying in the mid 20's in our B200 and A200. Worst I've landed with was a 1 hour reserve. I think OKC might be pushing it for the 200. Have also taken a 350 out there, and you'll have no problems,,,almost regardless of weight and wind.