30-06 brass is fine & simply size w/ a tapered expander button, load & shoot. If you are going to Africa someday, just buy 40rds of Norma or Wby, & you are good to go.

My 23" Hart loved 4320 with 225's, 4064 good also for 200's but I could live with just 4320 for accuracy and velocity.

Brass, someone said already, and I used WW too, more capacity. Just ran mine straight through a custom Redding 2 die set (mine made when still a wildcat). Never split brass. Oh, it WAS '06 brass.

Hard to beat this round. WM will beat it with more recoil and 3 instead of 5 in the gun. But not by a lot of fps, about 150 or so.