Here's a reply I sent a couple days ago on the same topic re: AA2230 to an IM:
Per this link starting load is 22.5 and max is 25.0.
I suggest making 10 rounds each of 22.5, 23.0, 23.5, 24.0, 24.5, 24.9
grains and shooting them in order for function and accuracy, then load
the best load in bulk after test firing.
This is good basic reloading practice which you should learn. It can
save your butt if you just pick a load at random and make massive
quantities, then find out it's too hot and you have to pull all the
rounds. Do the homework
Even though max is listed at 25.0 grains your scale is accurate to +/-
.1 grains, hence your 24.9 grain load might really be 25.0
Don't get enamored with pushing bullets to the max, it's harder on the
rifle and the brass, but if you wanted to and you worked up your loads
from min to max then you'll be safe loading up max or near max loads.
I have a section on Working Up Loads at http://www.ar15.com/content/page.html?id=469
All that being said, I usually settle on 23.5 to 24.0 grains
I then followed up with:
To add, if someone gives you their favorite load, like I just did, use
it to confirm your findings, not to use as is. Powder, primers have lot
variations, etc. Just some advice and it's free