It has been shown to have no weight if you believe the second amendment protects your rights to small, unscope pistols only.
A .40 HP at short range will stop a bear before he takes another step? As I said, if you are talking about a black bear you might have a point.
I found this on a web site about guns for defense from bears: "If you must rely on a handgun for bear protection, go with a long-barreled (6" or longer for full velocity) magnum revolver. Preferably, this magnum revolver will be .44 or larger caliber, shooting a heavy, non-expanding or deep penetrating bullet and you should aim for the central nervous system (usually the brain). This will work, but you have to be able to hit the central nervous system 100% of the time under stress, which not many people can do. If you are not an experienced handgunner and/or are not willing to practice regularly with your bear gun, I suggest that you forego choosing a handgun. Remember that accurate bullet placement is the key to stopping power!"
An article from a website called Self Defense in the Wild said this:
"When there is danger from the great bears or any large predator a rifle is always going to be the best choice for a weapon. However, a rifle is not always a convenient thing to have with you. In circumstances like these a properly chosen handgun with the right ammunition can get the job done.
If the potential threat is primarily from the large predators like the great bears than acceptable cartridges start at the 44 magnum and go up from there. Commonly available cartridges that are appropriate are the .44 magnum, .454 Casull, .480 Ruger and the very large .500 S&W."