Maybe this will give you a start??? My 243AI is a nine twist. I load the 95gr Sierra Match King over 48gr of RL22. Bear in mind that RL22 can be temp sensitive!!!!!
My suggestion is to start with 46gr and work up in half grain increments.
My rifle is a Jim Borden with a 26" Hart barrel. This RL22 load is giving me just over
3400fps.
GOOD LUCK and GOOD SHOOTING!!!