For an accurate hunting bullet, the SST is hard to beat. I have used them in several rifles all shooting well under sub MOA at longer ranges.
The 140gr SST is in fact one of the longest 6.5 bullets anywhere. This relates to very high BC. Accuracy in several rifles, including my 6.5 Mystic puts it in match category.
As a rule, the SST's will have higher real world BC than any similar weight/cal hunting bullet. Only some VLD match bullets beat them.
The Amax are also very accurate with very high BC. They are differently designed. The 140gr SST has a higher BC then the Amax. The 162gr 7mm Amax higher then the SST.
Just load them and shoot them. I am sure you will find them very accurate. On game performance of the SST is similar to the Interlocks, meaning very good.
Jerry