spitstickler, I settled on the 62gr SS109, IMI or Brit. I haven't found any U.S. M855. They exit and blow lungs, guts, etc out the exit hole. If you want to drop them where they are, a head shot does it, or centerpunch the shoulder. It will take out their front wheels and vitals too. The longest shot I've made so far is 140 yds behind the shoulder. Had to do a coup de grace, but the hog was down and couldn't get up. I haven't killed anything over about 100-125 lbs with the AR, but would take on a big hog with it and just hammer down on him. I figure if they leak bad enough, they'll go down.
I've tried a FN and M1A, but the AR gives faster follow-up shots on a bunch of hogs that are going nuts. If you use a scope, stay under 4 power. Otherwise you may not be able to see more than one at a time when they scatter.
Small world. I've got family in Double Oaks.
Have fun, Tom