Most 223's have a 1-12" twist, not the 1-14" of the 222, that plus the couple hundred FPS advantage gives the 223 the ability to stabilize longer bullets such as the Barnes, or 60 grain partitions. IN my limited experience anyway.
Just looking for input from those with experience with the slower twist and speed like the 222 has.
The twist varies by maker, the velocity differences look good on paper, but not so different shooting them side by side, esp. with handloads.
My suggestion is to not worry about it and start shooting a bunch of light bullets and see what shoots well for you.
This, based on a six or so year stretch of shooting gophers off a hilltop outside Moose Jaw, next to Brutus, with his .222 (Remington 600, IIRC), and my .223 (14 twist Douglas barrel, 20 inches, IIRC).
If you are concerned about advantages that show up on a calculator, buy a .22-250 and get it over with. In real world use, we could not tell the difference between them, performance wise.
Missed gophers don't blow up worth a damn. Any 'varmint' bullet (light jacket construction) is gonna work fine.
Cheers
Trev