I'm a believer in the high quality of the FN CHF Chrome Lined AR barrels. Did a lot of research on these and everything I have read tells the same story over and over about the high quality materials used and the precision and care that FN uses to build these barrels. Also, a friend of mine works at a company that builds the machines for FN that they use for the CHF process and he has nothing but high praise for the precision barrels that those machines can produce.
I recently put together a build that I intended to be a "do it all" gun. Wanted combat grade toughness and quality, able to deliver 1 MOA accuracy, that I could use for either home defense or for DMR/Recce match competitions. I used a FN barrel, 5.56 NATO chamber, CHF and chrome lined, 1/7 twist, and 14.7" length in what they call their "optimal profile". I picked a shorter than average barrel just to add some excitement and so I could push the barrel to it's limits and see what it will do. Was getting just under 1 MOA during range testing with Black Hills 5.56 77gr OTM match loads that they market as D556N9 Mk262 ammo. After 2 range trips to gather Dope at 100 and 200 yards, using weaponized math and no chrono, I figured I was ready for a match. So, I entered and shot a DMR match at Clinton House, SC a couple weeks ago and was very happy with the performance I was getting. I had good hits on targets from 100-700 yards, when many other shooters were having trouble connecting at the longer ranges.
As a disclaimer, I have some years of experience shooting various matches and building and modifying AR and other platforms. Also, I did use many of the tricks used for AR barrel installation that help ensure top accuracy and would recommend similar attention to detail in this area for any AR build where accuracy is the goal.