Thanks for all the input. Really appreciate the discussion. I like the idea that the ARC ammo is pretty comparable to the 223 IF you are buying factory heavies. If that is indeed true, I can make a better case for the ARC.
For those with more experience and probably have even read more (I did see the AK Moose vid)... I kill virtually all of my animals at 40-150 yards. Hunt timber almost exclusively and sometimes I'll get a chance at something at 150. There are places I could shoot 400+, even 800 or whatever, but honestly, have not had that opportunity come up. So, I'm in the woods and the bull is 75 yards... any diff 'Really' in penetration and deathing between these three guns, all with their heavies?