150 is great I think as long as it's placed well like others have said. My gun shoots so well with the coppers I want to go and just shoot shoot shoot off season now but the 3$/shot hurtsI purchased several boxes of these federal copper 150gr for .308, but haven't had an opportunity to test on an animal yet. They grouped very well at 100 yards. I'm planning on hunting cow elk next fall, do you think the 150 gr is sufficient?