No one else has answered, so maybe I can help.
I don't, and haven't, loaded for the 8mm, but have other very similar calibers. I too, have read quite a bit about the 8mm through the years so perhaps I can steer you in the right direction.
My Nosler #4 lists data for their 200gr Partition. The data should be applicable to the 200gr match bullet, however, downrange trajectory should favor the 200gr match.
They list 52.0gr of IMR4350 at 2,698fps as most accurate, and maximum load. Due to past experience with 30/06, .257Roberts, and 7x57Mauser, and .308, I'd say that sounds about right.
For something different, try either IMR4064, or Varget at 46.0gr, as well as RL-15. (Maximum, approach with caution). Start at 42-43gr and work up.
This data was developed in a Lilja 24" barrel with a minimum spec. chamber, so your barrel may be a bit looser, and capable of higher powder charges to approach this data. Also, if loading for an older military 8mm, I drop the charges perhaps 15% to start off.
The Speer #12 lists H380 as the fastest powder in their tests, at 52.0g for 2,479 from a M98 VZ24, evidently a surplus rifle and barrel. Velocities were a bit lower and charges a tad higher than the Nosler data.
My limited hunting experience with the 8mm is that it is an outstanding cartridge and has simply been overlooked due to it's Metric origin, and having been used by the "other side" during WWII.
Hope this helped.