30-30 is FANTASTIC, if not overkill.Because ofits ease to maneuver in the tight spots, and its quick follow up shots, its a great brush gun. Pigs hides are over rated and they are no tougher to kill than deer in my opinion. The only problem i have seen is, when using corelokts, sometimes the entry wounds and exit wounds are small and seal up because of the fat/lard in the hide, which in turn makes it hard to track if they dont drop on the spot. Because of this, when using somethingotherthan a 30-30 (usually270), i use ballistic tips to ensure a large exit wound that doesnt close up and they havealmost alwaysdropped in their tracks.I'm a firm believer in goingbigger if you are in doubt, butpigs arent super tough critters with super tough hides so I haventfound it neccessary to go too large, but if you feel more comfortable/confident with a larger caliber, go for it. Confidence in yourself and your rifles abilities are a large part of shooting accurately.