My younger brother had very good luck shooting 223 in 223AI. I also had good luck in shooting 22-250 in 22-250AI. On my 375 H&H AI I just used 375 H&H loads as practice off-hand and am unsure regarding accuracy.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally