Repelled, I don't doubt that. Unfortunately the difference between a bluff charge and a bear intent on killing you leaves little time. One, maybe a second well placed shot to the nervous system. Personally I'd prefer a .44 though I carry a 357 in not grizzly country, with a hard cast bullet, I use Buffalo Bore. And I carry spray too. Not suggesting there's anything wrong with a semiauto, particularly for someone used to using one. Against a bear intent on harming you, I'd question hollow points. And short of a successful head or spine shot, a fatally wounded bear has 20 to 30 seconds to deal with you. Not a situation I ever want to deal with.
Good points.
I carried a 44 for the same reason until I read the number of grizzly attacks that were stopped by a 9 mm. I’m sure some of it has to do with the effect of 15-18 rounds vs 6, having to do with sudden blood loss. The cardiovascular system is a closed container, and the severing of medium and small medium arteries starts to add up. Once a certain threshold of severed blood vessels is reached, the animal will drop in its tracks.
The G2 R.I.P. round opens into a star shape, with a significant increase in diameter.