I am very greatful for all the responses to my question, but one more. Would a .357 be enough for Mt lion, black bear, maybe wild pig?
Shot placement and bullet construction will be more critical in a .357 Magnum than in heavier larger calibers.
Also barrel length is more important.
You lose too much velocity out of short barrel .357 mag guns to be effective.
A 6 inch 686 with hard cast rounds will kill a bear.
A shot through the skull will stop a bear quick.
I doubt it will break a shoulder or have the energy and penetration to damage a big Bear's spine.
There's a big difference between killing an animal while hunting and stopping a dangerous animal while charging you or already engaged in a attack.
A .357 would be a minimum caliber to use.
If you stick it in a bear or mountain lion's ear I'm sure it will work.
Personally,I'd recommend a 10mm,44mag,45long colt,454Casull or one of the custom Limbaugh rounds.
Remember hollow-point rounds designed to work on humans are not good on large dangerous animals.
If you're worried about weight Smith and Wesson makes two different Scandium .44mag guns.
They are designed to be carried allot and shot very little.
Believe me,If your life is in danger you won't notice the recoil.
You will develop a flinch if you practice with them allot.
A steel .44mag like a 629 with a Houge rubber grip a 16 year old girl can shoot.
Don't let recoil freak you out.
The Scandium .357mag revolvers kick WAY harder.
The Glock 20 is also highly recommended.
15 plus 1 of 10mm is good medicine on man or beast.