Re: 22-250 AI
My favorites are 39gr. RL15 with 55gr V-max or Ballistic tip, out of a 26" barrel. That should be just under 3900fps. Or 40gr behind a 52gr A-max. Those are not max loads (at least 1.5gr under as I have not pushed them since groups started to open up.)
As far as load data goes, just add 4gr to the max load for standard 22-250 and work up from there.