I forum in Oklahoma called BoomerShooter.com. It is all about competive shooting. I shoot with 3-4 guys that are out of stillwater and i live just over in Guthrie. Here are all the matches in and around Oklahoma.
http://www.boomershooter.com/forums/...-area-matches/
USSA in Tulsa shoots steel challenge on the 1st Sunday of the month and OKC Gun club shoots it every other 3rd Saturday. If u haven't been to either if those club/ranges you owe it to yourself to do so. They are two of the best ranges I have seen.