Re: Best Powder?
Hodgdon Varget ( Aussie made AR2208)
For a slightly faster powder H 4895 ( Aussie made AR2206H )
Faster again hodgdon Benchmark . ( Aussie made Benchmark 2)
All three powders will work with 120 to 139 or indeed the full 7mm08 range of bullets upto 162 grain.
Probably Varget is a good place to start.