Re: hornady a-max
I have shot the 80gr AMax vs the 77gr SMK - same rifle, worked up load for both, same wind conditions (5mph, gusts to 10mph) at same range (600yds). 18" Noveske 1:7 twist barrel. The AMaxs offered a huge accuracy advantage at 600 yds, easily sub MOA, whereas you really had to work at getting the SMKs to shot an MOA. At 100yds, the AMax and the SMK look exactly the same, but at 600, wow, the AMax really shines.
Spot69221 is right on - 80gr AMAX will shoot like a 175gr SMK.
Highly recommended.