Never have hunted hogs myself, but I'd use a smoothbore bbl, a peep sight, and Brennekes.
Smoothbore for using 00 as a backup round, a peep for fast sight acquisition and accuracy, and Brennekes for the awesome effect they have on impact. Also, since my best tree climbing days are long past, I'd shoot to break at least one shoulder on the hog.
Hope this helps...