Not with a 45 acp though, it just bruises.
The tiny quibble I have is that I agree with Tim.
You're kidding yourself packing a 1911 for the bears.
What Does the Button Do? I think a big revolver would be better than either.
Phil backs up his hunters with a 45-70 or a 505 Gibbs, because he's learned that's the ballistic category of projectile needed for these large bruins.
Carry bear spray, and talk while hiking.