Bears aren't any harder to kill than any other animal. If a bullet works well for deer it will also work well for bear. I hunted with and killed deer, elk, and a bear with a 140 grain btip from my 7 mag. Just shoot them where it counts. Now my 7 uses both 140 btips and 140 accubond interchangeably. I prefer the abond for penetration and heavy bone shots. Last year i killed a bear with a Berger target bullet and had huge exit hole. Probably mentioned but take a look at the bears anatomy, they are slightly different than deer/elk.