I have only used the 30/06 and 44Mag to shoot hogs with so I'm not going to be much help here. I load for carbines too so, again, not much help. Sorry.
I know that the 357Mag is on the light side for a 300lb hog though. The smaller ones, not so much. They aren't that hard to kill but, the bigger ones may take more punch than the 357Mag can muster out of a 6" barrel. At least, to provide a clean kill. The 41Mag, that will do the trick, no doubt about it.
I shot a 300lb sow, running right to left at 40 yards offhand with my Marlin 1894 using a H&G #503 @ 1750fps. I hit it cleanly right in the boiler room and it went down. Wasn't dead but down. So, while some use Gamo air rifles to take them, this ole' boy ain't taking nothing less than a 44Mag!
The last two I shot was with a 44Mag, 240gr Hornaday XTP with a full load of Lil' Gun, about 1800fps from the Marlin. One went in just in front of the left front leg and went lengthwise exiting the right rear ham breaking the leg of the hog. It went about 300 yards! It blew up the insides of that thing something terrible.
The last one I shot, was right in the eye at 50 or 60 yards with the same load. It dropped like a rock and kicked for a minute or so. The eye was gone, and the exit hole was big enough to put several of my fingers in.
Girls stick them with knives. One guy uses a spear. Me, I want at least the 44Mag.
Just got a new rifle to shoot them out of too. Ruger M77/44 stainless with a synthetic stock. Gotta get a scope and go to it.
Well, that took a long time to say nothing!

Well, nothing that really helps you and what you are looking for but once I got to talking about hog hunting I just couldn't stop!
