I hunt elk. They are tough and shot opportunities few. Once shot a bull elk at 400 yds just before dark. Took me until 2 AM to find it and almost gave up. 308 180 grn bullet went through one lung but not both. Obviously both is better. That experience caused me to move up a tad to 30-06, 7mm mag & a 300 wsm. If hunting tough game, i.e. elk or bear to me it is about confidence & that is subjective. Still like the 308 but a little extra edge gives me the hope I won't be tracking until 2 am or losing/wounding game. Just one real world experience. My hand loaded 30-06 shoots 180 grn bullets at approx 2800 fps on my chrono. I like that!!!!! If you don't hunt tough game or always get close shots the 308 is fine.