Looking into getting a pistol. I kinda want to get a do it all if possible, but I'm not sure one exists.

Revolver or Semi-Auto I'm not too concerned with.

What I want would be something as a bear back up, that would hopefully shoot a large caliber type cartridge that could also shoot a lower powered cartridge, ie like a .454 casull and .45 colt, also I'd like to be able to buy snake loads for it, and I'm not sure if snake loads are strong enough to cycle a semi-auto?

Also I've heard the .454 kicks insanely bad, ie more so than a .480 ruger, which I hear is not that popular or on its way out? but less recoil....also the .454 may even kick harder than a .500sw?

I'd like something smaller and lighter weight as carrying it as a backup would mostly be it's intent. And for just shooting I'd probably mostly use the lower powered rounds, ie the .45colt rather than .454 unless i was hunting brown bear etc...or elk in griz country. So mostly just plinking and snake loads.

How popular is the 10mm for a semi auto? is that even powerful enough ?

.44mag kinda seems like the low end for real bear back up discussion, but does the .44 have a smaller brother it can also shoot?

I'm quite unfamiliar with all the pistol loads/cartridges.

I saw SW has a .460 which is even more powerful than a .454, but if the .454 already kicks like a mule, than the .460 has to be horrible right?

If anyone knows the recoil #s of a .454 casull, .480 ruger, 500sw, 44mag, I'd like to compare those stats...

Thanks for any help guys.