I am a big fan of the Swift A-Frames for big boned heavy skinned animals. They do not expand all that well, but penetrate deeply and will break bones and keep right on trucking. They are known for maitianing on average 90% of their weight. I have shot several moose and caribou with the A-frame, have never not had a bullet pass through, and its a bone crusher. My second choice is the Nosler Partition, better expansion than the A-frame, but not quite the penetrating ability. A black bear has thick heavy bones and a tough hide. Get a heavy penetrating bullet and shoot him in the shoulders. You break those bears DOWN! Worry about lung shots with no meat damage on your elk. Break that sucker down is the motto most bear hunters up here seem to have. I even know one guy who has shot a few grizzly bears that claims that shooting them in the hips is even better than the shoulders. Shatter the pelvis andTHEN put a killing shot into them.