By "under gunned" Jon, do I surmise that you use a .410 for dove and quail, but never for dangerous game animals? I once read that WRA took a 20 gauge M21 and re-barreled for a .405 calibre "double express rifle""- possibly one is in the Cody Museum. Let's see, a .405 caliber would fall between a .375 H&H Magnum, and a .416 Rigby, correct.
We get into feral pigs on occasion, thanks to some that escaped their pens from a private wild game ranch, a few clicks NE from where I live. One of my farmer friends in that area is a real rifle "nut" and likes the big bores- Mauser style BA rifles, and has a .375 H&H Magnum, and killed a large boar with it this past Sept (no closed season on feral pigs, and no license req'd here in MI to kill them.
That largish caliber might be "over kill" for moose, I don't know, as I have never hunted moose, or elk. But as the late Robert C. Ruark once wrote these words of wisdom: "Use enough gun!"
