I think what Drew is trying to say is that bullet placement is very important and don’t get too caught up in the numbers. Both of the energy numbers you listed are sufficient to kill a bear. With both examples you listed: If you put either of those bullets in “no mans land” you probably won’t kill the bear. If you double lung or heart shot the bear with either it’s going to die. If you one lung with either it might or might not die, depending on where you hit the lung.On the Federal Website a 165 gr trophy copper in 308 carries 1448 ft lbs at 400 yards, a 165 gr trophy copper in 300 win mag carries 1989 ft lbs at 400 yards. That's a difference of over 500 ft lbs, a bear won't notice that?
Now, that being said: Many hunters in Alaska and Africa go by the motto “use enough gun.” Ruark wrote a whole book about it. Kind of. But California is not Alaska or Africa.
@Truduct I’m not trying to speak for you so feel free to correct me if that’s not what you were going for.