Short barrels, less than 22 inches say, work fine for sluicing grouse off the road.
Those 18 to 20 inch short barrels are a real disadvantage for wingshooting. Not impossible, just not ideal.

Everything you said up until you’re last point was good info, just because you dislike or have never used shorter barrels doesn’t mean they’re a waste of time. Short barrels for upland game hunting are more useful than longer barrels from my experience, provided they are threaded for chokes. You’ll lose some muzzle velocity and follow through on a moving targets isn’t as easy, but otherwise they’re just as effective. Maybe you should try them before you slag them, seeing as you said “probably a waste of time” I’d guess you’ve never bothered to. I’ve shot plenty of upland game with a choked 12.5” barrel, in fact more than with the 28” paperweight in my closet lol.
Since you concede that barrels that short result in the loss of some muzzle velocity, and that follow through on moving targets isn't as easy, I think to some extent you agree. Firing slugs from such a barrel would definitely not be conducive to good groups.
Maybe you should try them before you slag them, seeing as you said “probably a waste of time” I’d guess you’ve never bothered to.
You'd be guessing wrong. I have a Dominion Arms Marine with a 14" barrel. I bought it for bear defence. The short barrel is handy for back packing and less likely to get snagged on a branch in a tight situation. I've only shot it to break it in and to observe the best choke for buckshot. It will never be used for hunting and, I hope, never for the intended purpose.
I’ll concede that drop in muzzle velocity is a factor but not enough of one to affect an ethical kill, with practice (which every hunter should be doing) wing shooting with 20” and less barrels is not that hard. I’ve honestly seen zero difference in slug groups with any of my barrels from 12.5” up to 30”, the biggest impact on slug grouping is your style of sights and the ability to have a repeatable sight picture. It’s not rocket science, it’s shotgunning and at relatively short distances in the grand scheme of hunting. Picking up a short barrel shotgun when you never practice with it is no different than bubba sighting in his deer rifle with one or two shoots and saying good enough at the pattern he’s getting, we’ve all seen how bad those once a year shooters are.
I use short barrel pump guns for hunting and skeet and see no real difference in kills or scores. When using a birds head grip my skeet score drops 2 or 3 targets but a full stock with a 12.5" barrel works great for me and ive shot perfect rounds in trap and skeet.
I never understood the connection between longer barrels and better slug accuracy. That doesn't seem to apply in the world of rifles, does it matter more in smooth bore?
Oh geez, I hope you never have to use it either. Buckshot as a bear defense load wouldn’t be top on my list to grab.
You have shot 22-23 in skeet with a birds head pump gun?



























