You might want to consider Slick Trick broadheads .... http://www.slicktrick.net/
I use them and like what they are doing to the mule deer I've shot in New Mexico. I've never used them on hogs but will soon. I have read and heard lots of good things about hog hunting with Slick Tricks.
Besides the damage done to the animal, you don't see any difference in the way they fly from field points.