It’s been a great run and very interesting watching the “caliber evolution”. The .270 and 30.06 were all about elk and deer back when, toss in a .243 for the deer as well.
Next I think came the 7mags and .300’s. For elk alone the .338 became the big deal. On occasion a .375 would show up.
Osky
The caliber evolution turn into the bullet revolution. Although a bullet like the Partition has been around forever, the advent of premium bullets turned cartridges like the 30-06 and 270, and a list of other “smaller” cartridges, into giant killers. There just really is no need for the big boomers in order to easily kill elk and other big game these days.