I would put a 41 mag as a min.The 357 would probably do okay with proper shot placement.Sometimes things don't always go as planned. The bigger calibers are a little more forgiving.The 44 mag as mentioned would be a good choice.I might suggest the 454 Casull where you can use the 45 Colt.The 480 Ruger would make a great hog round.

Ruger Redhawk