Zoro,
I agree the heavier the better. I must qualify the 5, 30-30's in the side with little effect story. The guy started shooting at about 100 yds and finished at about 220 so he wasn't using a 30-30 to it's best effect on hogs. He did however connect on every shot on a running hog quite impressive at those ranges I'd say.
His bullets just barrley made it through the shield and into the lungs, very poor penetration. It did however stop and would have killed him eventually. This was a good sized hog about 300 lbs. I don't think a .243 would've done it in that situation. But you never know. I for one would not rely on a poddle shooter in the brush with a big pissed off boar, but hey that's just me.