It don't take a lot for caribou as they're not really large animals. The .308 is good there.

It'll also do fine with moose.....but as previously mentioned....use a premium bullet to insure good penetration.

I'm not at all a .308 fan as the 30-06 is quite available and ammo is everywhere (as are the .300 mags) that I can't see owning a .308.....but it's adequate for sure.

A heck of a lot of big game have bitten the dirt due to a well placed .30-30 so thge .308 is quite a bit more than that.