Ran your 168 gr bullet on Quickload for the 300 WSM through a 20" barrel, COL = 2.860.
Disclaimer = Information only, don't do this.
It says 56.0 gr Varget would fill the case to 88.6%. PMax would be 50,241 psi giving MV of 2689 f/s. Burn rate = 99.1%.
Sorry I can't display the Quickload chart for you like others do. I'm too stupid. If you're familiar with the Quickload display it shows the pressure curve topping out just into the yellow zone with a 56 gr load so I'd definately take this as a max. Running the program for a 58 gr load as posted above, I get an MV of 2773 f/s and PMax at 55,189 psi with the pressure curve just touching the red zone.
Without going into detail again, your 50 gr looks a tad light. 52 gr looks better to start. MV should be about 2517 f/s with 52 gr. Burn rate = 97.4%.
Please get some confirmation from a manual and don't use this post as your guide to run up loads. If this info coincides with your manual then it'll serve as a confirmation.