Go to the TC guru Mike Bellm http://www.bellmtcs.com/store/index.php?cid=24
Read his articles on straight wall cartidges and TCs and issues with their standard chambering methods.
I hunt Ohio with a 357 Maximum in a TC
Mike rechambers the standard 357 into the Max which is the best straight wall deer cartridge. It is a decent 150 yard deer gun, but not as accurate or handy as the shotguns.
You will find that with thbe Ohio straight wall restrictions, that the 20 ga slug guns will be more effective than any straight wall pistol cartridge.