I hike/backpack in the Pacific Northwest and I want a gun with great penetration. We have bears (even some grizzly), moose, and cougars. Of course, I am only trying to prepare for the very worst encounter. Yes, I know the more likely threat comes from humans, but I'm not going into the woods with a .380 because of that.
As options, I have a S&W M&P40 (15+1 capacity) and a Ruger SP101 in .357 magnum with 2-1/4" barrel (5 shot). I have some 200gr Double Tap ammo for the M&P40 and I was planning on buying some 200gr Double Tap for the .357.
I know the .357 magnum has a reputation for great penetration and it has taken down every animal in the lower 48. The SP101 is tough and dependable. The M&P40 carries 16 rounds (MUCH more than I can envision needing) and recoil is more easily controlled. With those two guns/calibers as options, which would you choose and why?