I'm in the short-range, heavy cover, hog hunting camp. I love the beauty of longrifles and fowlers but the older I get the more I like using shorter barrels, carbines and pistols.
My personal preference is that as the barrel gets shorter, the bore should get bigger and/or the projectile heavier (within the manufacturers recommended limits of course). You'd be surprised how much powder can be burned in a short barrel if there's a tight fitting 400 to 700 grain slug sitting on top of it.
If I really need all the power possible from a short barrel, I don't mind a little unburned powder spraying out the muzzle - if it ups the KE. To quote Elmer Keith when he was helping develop the 333 OKH "Efficiency be damned! We want results!"