I'm not sure the .357 Magnum will be up to a hog hunt but that will depend upon how big the hogs are. Also, a 4" barrel double action revolver isn't usually the best handgun to use either. I would rather use a 6.5" or 7.5" single action revolver in a slightly larger caliber. This newer Ruger
Super Blackhawk which has the Bisley grip frame, hammer and trigger in .44 Magnum would be a great choice IMO.
A very good hunting load for the .357 Magnum is a Cast Performance
180gr WFNGC bullet which has a very wide meplat and a gas checked base. If you were using a Carbine I would suggest going up to a 200gr bullet but it's my opinion 180gr is the heaviest bullet you should use in a revolver.
As for powders many will tell you to use AA#9, 2400, H4227 or W296/H110. Those are all good powders but I have been using Hodgdon's Lil'Gun for bullets heavier than 158gr in the .357 Magnum. According to the
Hodgdon Load Data site you can achieve higher velocities with much less pressure with those heavier bullets than with W296/H110. I still use W296 with lighter bullets but have gotten good results with Lil'Gin when loading a Hornady 180gr XTP bullet or that Hard Cast bullet from Cast Performance.
I am using a charge of 15.0gr Lil'Gun under a Hornady XTP bullet. I won't give you the charge of Lil'Gun I'm using under the Hard Cast bullet because it's not listed in any of the current manuals and I can't be sure it's over the current SAAMI specs. I'm sure you can figure out what charge to start with if you look as the data from other weight bullets and extrapolate the data.
I hope this helps and good luck on the hog hunt.