Chilluns, chilluns, chill....
Let's not forget a couple of things about the 22.250...it DOES stretch a little. It IS pretty warm for a 22 bore, Ackley or not.
Overall, however, there's really nothing wrong with going AI especially if you get a better chamber or even a fresh throat with a re-cut. And if you are going to go with a faster twist and more bullet, the extra room allows more slowish powder.
Besides, Ackleys just look cool.
