Where are you going to hunt? In Indiana the rules dictate .357 min caliber case length no more than 1.8". Are you a hand loader? Do you want to mess with wildcats? Factory loaded ammo only would mean 357 Magnum, 44Magnum, or 460 S&W( 454 Casull, 45 Colt work in these also) - barrels available from T/C - the 44 Mag is done just about every year by dealers in Indiana as a special run from T/C or you can order from MGM. 357 Maximum is also a good choice but factory ammo is hard to find - if you reload brass is available sometimes hard to find but available - Mike Belm chambers Bugara barrels for the round and has brass available - MGM will also do a custom barrel for you. In Wildcats you have the 358 Hoosier or 358 WSSM (1.6) as alternatives. There are sources for loaded ammo AJ Brown for the Hoosier and Just Hunt for the WSSM - If you are after one of these best to get the barrel from the ammo source, of course if you reload the dies are available from Hornady on the Hoosier and Redding on the WSSM. Hope this answers your question.