GRADUATED RESPONSE
(1) Most practical: Ancient, ancient, ancient Mossy 500 with three barrels --30" full choke, 26" with adjustable choke, and rifled slug barrel. Also has a sling I attached thirty years ago, M/L.
I rarely actually use it anymore because of the recoil but for all around "Practical," can't be beat. I figure any situation where I
needed any of its manifold functions, I'd probably only be shooting two or three shots, so recoil would not be much of a problem.
I'm sure it saved my life once while I was just "prowling" up near Nederland CO when a pack of about six sorta-feral dogs decided I was intruding on their terrain, came whooping and barking up the hill at me. They meant business, scared the crap out of me.
I dropped two of them at 25-35 yards with two 3" loads of lead BBs out of the 26" barrel set to full choke and the rest ran back down the hill. No rabies tags, no collars, no bandanas. I suspect they were owned by someone who lived in one of the old mining shacks, but who let them roam free --which is illegal.
(I'm wanting to try out some of those Aguila shorty shells in it. Seem to feed OK, but haven't fired any yet.)
(2) Next most practical (don't laugh): my M1 Carbine. Light, handy, accurate, easy/cheap/fast to shoot, negligible recoil,
can take a deer in extreme circumstances. Only legal for deer in some states (Florida, Louisiana?) but in extremes, who cares?
(3) Three-fifty-seven Ruger Security-six with 4" barrel and adjustable sights. Powerful, accurate (if you take great care with that short sighting radius), pointable with the Pachmayr grips, cheap to practice with. Roamed the mountains many an up-and-down mile with that one, but I don't use it for concealed carry since autos are easier to hide.
The rest are just plain fun. Hey, that's
practical, too!