Quite a difference between some of the manuals.
You're right. I was at the store last night and pulled the Hornady manual off the shelf to see what it says about RL15 w/ the 200 gr Interlock and it lists 57.3 as max for approx 2800 fps.
Given the longer bearing surface on the Hot Cor, Accubond, and Partition I suppose that makes sense.
Thanks again for the assistance guys. Keep 'em coming!