I've handloaded for both a BAR .30-06 and Remington Woodmaster 742 also in 06.
I used IMR 4064, 180 grain Rem Corelokt or Nosler Partitions with 46 grains (minimum load) and 50 grains max load.
Reference: Speer Manual 12 Edition.
Recommend starting with the minimum and working up to see which load prints smallest groups.