I spent this fall trying out different loads for my K98. Worked up some light loads for plinking.. 125gr Hornady HP at 2900fps.. makes for a nice load you can comfortably shoot all day.
Loaded up some 150gr Hornady SP, but didn't really spend the time working up the load.. but it can easily be pushed over 2800 fps and should perform very well.
My favorite is the Sierra 175gr Pro Hunter, chugging along around 2500 fps, although I was pretty conservative, and well under max.. probably can easily push it to 2650fps, making a decent larger game load.
I worked up most of my loads using W748 and CCI LR Magnum primers. W748 meters great, and seems to be right in the burn range / case fill for the 8mm Mauser. I had thought about trying some Varget, but never got around to it before hunting season began.
Hope to do some more testing as soon as it warms up a bit.