Robert Baggett, stick with that slug gun. Sure a 30-06 will kill a bear. So will a 243, but I always like a big hole. If you have to track a bear a big hole will let the blood flow, that is what you want. Bear fat will clog small holes and the bear fur will soak up the blood and make it a little more difficult to track if needed.
My taxidermist has no problem repairing bullet holes. I could not show you where the repair was done, he does such a good job.