Whitey,
I get out that way pretty often during bird season. We hunt roosters just over the KS border. Do you know Ellis Brown? He hosts a "elephant shoot" every summer where we get out the big bores. Ellis and several others in attendance are gunsmiths and many of the arms being shot are build by us shooters. I can forward you more info on the shoot if you like.

P.S. I also have an addiction to single shot rifles.
Steve