I don't think a .300 Win Mag is going to smack a hog too much harder than a .308 or .30-06 would, but I know it's going to smack you and your wallet to do so. A .308 (or maybe even something like a 7.62X39 or .300 blackout) should be more than enough to do the job. If you're stalking and looking for high numbers, I'd be looking at something with a relatively high capacity magazine and preferably a semi-automatic. Something like an AR-15 in a slightly larger caliber, SKS, Mini-30, VZ 58 etc. If you want a bolt action, I'd be looking at something along the lines of the Mossberg MVP .308