I asked the folks at a gun shop what their most popular caliber was (sales) = 270WSM for the last 2 years. However, I saw a chart of most popular calibers (Nationwide) and they were as follows:
1. 30-06
2. 270 Win
3. 300 Win Mag
4. 7mmRem Mag
5. 243 Win

My guess it will take YEARS for the WSM calibers to catch up, and who knows if they even will?
BOTTOM LINE - If you have one of the top 4, you can hunt almost anything on our continent. The once - world record Polar Bear was taken with a 270 win and 150gr Core Lokt.