9.3 every time for pigs! They're big fat buggers, so the bigger the hole the better! Forget .30-06, military calibre restrictions will limit your options. You may not want to shoot france etc now, but what about the future? That's why I went for a win mag instead of a .30-06. The '06 is plenty for me, but you never know when you may want to go somewhere that wont allow it.