I’ve enjoyed shooting the 308. Mild recoil, easy to find a decent load, and it takes game easily. If 400 is your max, you’re not under-gunned.

Think of it this way, the 308 and 300 win mag shoot the same bullet. No one would question the idea that the 300 win mag is a 500 yard elk cartridge. By looking at impact velocities. That would make the 308 an easy 300 yard elk cartridge.