Personally, I would choose a 338 Win Mag for moose/black bear. It shoots flat and hard enough out to 300 yards. I would top it of with a Leupold Vari X-III 3.5-10X50. I used to have that exact setup with a winchester mod. 70. It was a great combo. Never did get to use it on game though. But, that is my preference. Good luck.