NW Hunter,
Mag pro is not Hodgdon, it is Accurate, sorry about that. Accurate lists Mag Pro in the 6.5 x 284 with only two bullets, both Sierra match.
123gr - max load - 61.5 gr @ 3275fps
142gr - max load - 58.1gr @ 3002 fps
My last 6.5 x 284 is built on a Nesika Bay action, 26" Krieger barrel...