Just depends on where and how I am hunting. If I'm hunting moose along the coast in the thickets or where visibility is limited, I use a large bore rifle with heavy bullets that are suited for bear. However, if I'm hunting in the mountains for sheep, where visibility is good, the 300 H&H (or any like classed cartridge) is fine.

Notice I didn't say that brown bear or grizzly bear was my primary target. If I go after brown bear, you bet I carry something like a 338 for minimum up to, maybe, my 500 Jeffery.

If I sheep hunt in a beary place, I make sure the rifle I have is flat shooting enough to handle the range usually encountered for sheep, but also with sufficient power for bear.

I wouldn't pack a 300 on a brown bear hunt, that may just be me, but I want something that has a bit bigger diameter hole in the bore. At a minimum, I'd go with a 338 Win Mag with 250 grain premium bullets. I'd feel more comfortable with a 416 Rigby and 400 grain bullets.

As far as elk, I haven't been lucky enough to draw a tag for our small population of elk. Caribou, I usually hunt as a combination with moose.