I’m a huge fan of the 6.8spc. Me and a buddy put together two ar’s for deer hunting about five years ago, and it’s all we have used since. It puts deer down well, and it’s light on recoil. All my shots are well within 100 yards but I have shot it out to 300. Out to 200 It drops a couple inches which is fine for me. I use the sst’s and federal fusion. POI is identical for both out of my gun. Order ammo online in bulk and it’s not much more that any of your other standard calibers.