We should cut the victim's partner a little slack. Tricky business, shooting a bear at close range in a high stress situation.
Maybe we should even cut a liberal amount of slack. The choice seems to have been shoot and risk the partners health or wait for the outcome of the attack. I doubt that the victim would have been better off with just waiting.
The amount of practice required for such a situation may not be affordable for the average hunter. I would expect it from a hunting guide though.
Especially with a hunting rifle zeroed for, say, 100 yards or greater. It would take some deliberate practice to know where the round would strike at close range.
The usual scoped hunting rifle is going to strike a little low. At 10m itīs about the distance between your barrel and the center of your scope. At 25m the difference can be neglected. I tried that with my 7x64. Itīs not that hard to compensate for that. Taking proper aim under much stress and in a hurry is quite a different subject though.