Mine has gravitated to the 7X65R. It closely emulates the 280 Rem. The 30 Blazer is a great round, but it requires a more stoutly built gun...thus heavy.
What's yours?
I haven't owned a combination gun in a long time. When I did, my favorite was an exposed hammer SxS 12 gauge x .30-40 Krag. Wish I still had that one.
Tom