Quote Originally Posted by ABNAK View Post
If you have a couple quality AR's and the appropriate 5.56 ammo for them set aside,
I really don't get the obsession with shooting 5.56. There are plenty of .223 rounds that are better suited for SD or HD and plenty of training ammo that matches those velocities.

Additionally, you don't have to worry about pitting or putting a hole through your plates at .223 velocities - 100 or 200 FPS @ 100 yards does make a big difference in that respect.