When I can I like to put a bullet in the ear canal. Drops a hog RIGHT NOW. When I don't have an opportunity at this shot or any head or neck shot, I try for a quartering away shot with placement behind the shoulder. This shot will avoid the shield on a big boar and still reach vitals. Also for ME AND MY GUN, I have found that big conicals work best. See my post about "hog poison indeed". That big sow was taken with a quartering away shot, downhill, and blew out her heart. She dropped like a rock. 70gr. 777 3f with a 385gr Hornady Great Plains HB HP. Great hog load in my sidelock.
BTW, a good blood trail on a hog is not to be blamed on PBs. I don't care for a PBs take down power but Hogs just don't leave much of a blood trail with anything. I've seen them shot with just about anything you can imagine and thier wounds close up quickly due to the large amount of fat. I hog hunt 2 or 3 times a week now that deer season is over and I sure do like it when I don't have to worry about trailing!