The .30-30 is fine. Especially the bigger bullets(150's and 170's). Study the anatomy of a hog if possible. They are kinda like a bear in that the heart and lungs hang down low. The spine is very low in the neck area and that is always a killer as is the brain. Put it in the ear and they will simply do the kickin' chicken.
There is NO RULE that limits the rds that you can carry in a centerfire pistol for hunting. I always have 15+1 in my Glock 20(or 8+1 in my Desert Eagle) especially if I'm gonna get down on their level. Would also highly reccomend Double Tap ammo outta the 20. I use the 200gr WFN hardcast. It absolutely hammers 'em.
Good Shootin' -----pruhdlr
You WILL fight....like you train !