Got the itch for a .223. Things have changed since I last owned one ~15 years ago. There is a multitude of twists now available to stabilize heavier bullets. I am curious about stabilizing 50-55gr bullets in a 1:8 twist. Is 1:8 too much? Do fragile bullets come apart? or is all good and it opens up some options for heavier 60+gr bullets to shoot longer range? Or, just stick with the old 1:12 and forget the heavier bullets. FWIW: Long shots will be 5-600 yards, typical distances ~300.
There might be a few very light, extremely fragile designs that will come apart in a 1:8 barrel, but most will be fine. And, the 1:8 gives you the ability to stabilize the higher BC bullets, should you want to maximize the .223’s long range capabilities. I would never buy a slow twist barrel in any cartridge capable of long range nowadays. Faster twist just gives you many more options.
John