Anything above 45gr 2208 is a bit hot IMHO. I use Fed210 (M's if available), lapua match Brass, 155gr HBCs and 2208. I suggest you start at the min and go up 0.5gr to 45gr watching very carefully for primers burning through and getting squished. I really, really would not go above 45.5gr and there is no need to really IMHO. The only time you want to be in the 45gr range is when you want to be supersonic at 1000yds and have a 28/30inch barrel to do it with.
What are you bullet seating with? The amax has a secant ogive? if so you may ring the projectile if using say a Lee seating die, get the hornady seating die with the amax / secant bushing.
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