I had lots of experience using them in my Encore and a friends A-Bolt, both in .280 REM. On whitetails they were nasty. All wounds were tennis ball sized or larger at entrance. It was a very explosive bullet yielding shallow penetrations and rapid expansions with large tissue damage at ranges from 20yds to 100yds. Extreme blood loss with large shock zones were seen with bruising as far as 3 feet from the entrance. Typically the core seperated and passed straight through with little damage as the jacket seemed to do the most damage upon impact. We never lost a single whitetail to them making neck and shoulder shots on all the deer. As for a bear bullet, I wouldn't recommend them. From what I have read, they perform better at a distance beyond 200yds. I would look to something simple such as the Core-Lokt or Hornady Interlock. Being a meat hunter, I quit using them. They even expanded rapidly on groundhogs /ubbthreads/images/graemlins/shocked.gif. By the way I used Reloader 19 in 53.4gr for the Encore and 57.4 for the A-Bolt.