I actually found a post on this site. The link is below. I hope I did it correctly and it works! I was not able to find a published chart - it is based on experience like yours.
powder temperature sensitivity
Only thing I buy by the 8# can is Varget. I load it for for son's 7mm-08 and our AR-15's. My Stag Model 6 likes the Varget with the 75gr Hornady BTHP match bullets on top. Works quite well on prairie dogs!
Looks like you had great results with the Amax. Good shooting!