Confed, you should link to those pics with a warning, not post them in
But to get to the issue, the fears of overpenetration, if they were ever legit, aren't an issue for predator defense. With a human you're dealing with upright torso of perhaps sixteen to eighteen inches thickness. With a bear you're shooting through the whole length of the animal, up to four feet with a black bear and six feet or more with a brownie. An ideal projectile has enough penetration not merely to penetrate a foot or two, but to blast through skin, bone, muscle and dense tissue of the front and reach through to the vitals. That's the work of a heavy hardcast slug, not of a medium or light weight SP.
There is no comparison between the penetration of a medium range SP and a heavy hardcast. Nor is there any evidence to suggest that the velocity loss from a 2 or 3 inch barrel as opposed to a 4 or 6 inch is going to render a 180 or 200 grain hardcast insufficient. The extremely high SD of those rounds, coupled with their inherently stiff structure, makes them able to penetrate more with less velocity.
When you're relying on a small backup revolver, you want every advantage you can squeeze out of the ammo. And resorting to self defense ammo against a bruin is not ideal.
As to recoil, I've shot heavy hardcast extensively from many .357 revolvers. I find it has less snappy recoil than the small high vels, and no worse than the mid range SP's.