DM, certainly no slur intended on Mr. Ackley. I'm only 49, a bit late for ever knowing the man. All my information has come from talking with gunsmiths that knew him, and some of his interviews and writing. I'm just a hobby gunsmith, and know my limits. Mr. Ackley knew more than I ever will about rifles, actions, and barrel work.
The only AI cartridge I ever considered was the .250 AI. That is one AI that does show a definate increase above factory at the same pressure levels. Maybe the .30.30 AI as well, but I don't think most modern cartridges benfit much from improving...those two dinosaurs reach back to the dark ages of smokeless cartridges.