Matt,
I still have 6.5 Creedmoor Hornady brass from my first rifle. The brass was purchased in 2010 and fired a bunch, and the primer pockets are still tight. However, I only used published data, though not just from Hornady but others, especially Ramshot.
This new batch of Hornady brass is a little lighter than the old brass, but not much. The new brass, however, is slightly more consistent than the old. Will have to see if the primer pockets hold up as well.
I have not found the AMP settings always perfect, and as the directions state they're not based on brass hardness but neck thickness.
As for the brass with small-rifle pockets, I guess it's the end of civilization as we know it....:-)
