In revolvers I have used everything from my 30 Carbine up through my 454, in autos both my 45ACP and my 10mm.
In most cases the shot ranges were easier measured in feet over yards. While I freely admit that the Carbine, is terribly light, it did what was needed when the time came. With the .357's I have used both JHP's and cast boolits in the 140 - 180gr range. Of them all I feel the 150'ish grain weights in a good controlled expansion bullet like the Gold Dots or XTP's are best but the same could easily be said for the same weight cast WFN's as well.
We hunt using a variety of tactics ranging form dogs, spot and stalk, to simply still hunting or doing drives. Around the areas I hunt them they are pretty savvy to having the heat brought down upon them so if you only stick to one method your not going to do as well. When we're still hunting the shots could be anywhere from 10' to 100yds depending on just where we come up on them, or cross paths. In every situation there are different variables, but usually at the initial shot they are headed the other direction at warp speed. Sometimes however, you get the odd one that heads right too you and thats when it gets fun. Other times we are in brush so thick you can't see more than a few yards ahead of you and when someone else jumps them all you can see is the brush shaking as they come to you. At these times, is when you really appreciate something with a bit of stopping power as you never can tell if they are 20# or 200# till they get there.
All this said my most carried revolver has been my Redhawk in 41 magnum. Loaded with the Remington 200gr SJHP it has put plenty on the ground. When I can roll one at 100yds in with it, I feel little need for anything else. Lately I have however been leaving it at home and hauling my 454 around, which I got a nice 80'ish pound sow with a couple of weeks back at 87yards, using some 300gr home cast boolits. I am now working on loads for my newly acquired Redhawk in 45 Colt. Preliminary results from what limited testing I have been able to carry out are showing some great promise. I shot a 3" group with it yesterday, at 100yds from a rest, so I feel that the hogs, just lost another rung on the ladder, when it comes time to get after them.
Overall I would suggest one of the following, if you handload the 41mag, if not then the 44 mag or 45 Colt. Any of these will be recoil friendly, for the most part, which will allow you to practice more. Ammo can be easily found that will easily take even the biggest feral hog to it's knees with a proper shot. Lastly, no matter which brand or caliber you choose get something with adjustable sights. This way you can accurately sight in for which ever bullet weight you decide to use. Pick a load that you can comfortably and accurately shoot well at 25yds off hand, and go have fun.