I have a fair bit of experience with bears, in the last 2 years I've been in on over 10 bears, you got more than enought. Black bears aren't that tough. I know several guys who have taken bears with 45-55 lb long/recurves. A 52 lb compound definatly produces enough energy.

I personally shoot 70 just because... however I have used 60 lbs on several bears and never failed to pass through, I've taken bears up to 350 lbs and the arrow keeps on going.

Have no fears you got plenty of energy, However I wouldn't recomend trying to break the shoulders just shoot it like its a whitetail and your good to go.

Kirby