The 223AI is only worth about 50fps over the 223 running at the same pressure.
There's no "WSM magic" happening. You may be able to run it a little higher pressure in a gas gun because it has a straighter case, but then you could run a 223 higher with a carrier weight too.
You have an AR chambered in 223AI?
Anyone who's pressure tested any AI will find at the same pressure they gain at best 50 fps.
Yes, plenty of people run them 150 fps faster than the parent chambering, but most of that gain in velocity is from running higher pressure.
