I use the same arrows that I hunt all western game. You'll be fine with you're current set-up. I'm going brown bear hunting this fall and will use my 400 FMJs at 417 grains with 100 grain 2-Blade Magnus buzzcut. I have a friend that lives up in AK and he said my set-up would be more than enough he's taken 5 brown bears with 60lb bows. I've always got pass-thrus on elk so it'll be more than plenty for a black bear.