At what ranges?
I have shot F-T/R with a .223 set up for the purpose. It is great to 600 but not much at 1000, no matter what the charts say about the BC of a 90 gr .224".
A .308 would be more versatile. You COULD shoot it in Open but would be way behind the curve, concentrate on F-T/R.
You are a proficient handloader, aren't you?