Any of the heavy VLD bullets will have to be single shot feed on a AR platform. There is an extended magazine and a modification that can be done to shoot 80 grain SMK. The Bergers VLDs are just too long to be magazine fed.
In my personal opinion the .223 should be kept to a 350 yard range and for further shooting the larger capacity 22s and 6mms should be used. For example the 22s and 6mms with 80-105 grainers out to 600 are hard to beat. The higher BCs and velocities make a huge difference in the wind.
Yes, the 223s will shoot farther than 350 but you are very much handicaped. The point is to plant a dog and keep the fur you will have much better chances with a larger and heavier bullet than the 223 will push at ranges over 350 yards
I shoot 77 smk moly BHA through my ar and it does the trick nice at distance, shot a few yotes with it at 400 yards plus and the exit was the size of a quarter. I am in the killing them business, not the hide business so i use a round that i know works at distance. I am good with that round past 750 yards on paper with some fairly good accuracy. I like the ar platform with the fast follow ups. I have a 24 in wilson match bull barrel with a 1/7.7 twist and getting arounf 2720 fps. I use the 20 round pmag with a nightforce 33.5x15x50 scope
i shoot a rock river with a 1:8 twist and im using the 68 gr. black hills moly, and just the other day i shot a bobcat just under the chin while it was looking at me at about 140 yards, and it didnt even exit. im thinkin it hit the spine a took a south bound turn down his neck. its also good medicine for coyotes, drops them all in their tracks no prob.....