last time i went range in Lana'i, I checked out the plastic container thats left on the tree for scrap brass. I separated the brass as I was board waiting for the wife to sight in her rifle.
What I found was more than half of the brass of approximately 500 was 30-06. 1/3 of half that was 300 and 7mm. Then the rest was a mix of 7mm-08, 270, 243, 264?, 25-06, 30-30 and some others,
In our hunting group of 8, 3 use 30-06, 1- 270, 1- 243, 1-308, and me (no loyalty) played with 270, then 300 win mag, and now 7mm. after this season, I'm probably going back to my 300 wm. The others, what ever they can get their hands on.
From my perspective: I'd go- 30-06, 300wm, 7mm, 308. For the wives in our group, 308 and 243 win the shot.