It seems I can't find any. I have a lot [and I mean A LOT] of legendary weapons of all kinds but never stumbled upon a legendary double barrel shotgun.

I think i had a mirelurk killer one once.

Lucky Shotgun sitting in a trunk somewhere. I'm looking for a legendary gatling laser. Preferably one with a faster fire rate/reload speed. Don't even know if one exists, but I want it. Not killing the Elder for it either.

I have found several. One has added plasma damage, another if I recall is 25% less action points in VATS. I will say, I have found less of them then any other weapon, Fat Man/Gauss Rifle etc included which is idiotic. The reason is simple however. The game considers it a very low level weapon, it only spawns on Raiders, possibly Raider Scum (the 2 lowest level varients) and the lowest level containers.

I had an infinite ammo one on my first playthrough but I sold it.

Imagine never needing to reload a Double Barrel Shotgun

I do not have to imagine, but most of My Legendary Double Barrel drops have been added Elemental and Plasma damage.

Worst Legendary-Irradiating Gamma Gun

My go to weapon is a legendary double barrel that does explosive damage. That is, each individual pellet in the shotgun blast has 15 explosive damage. By far my favorite gun for how insanely fun it is, not to mention powerful too.

Oh so it does exists after all. Mmmkay, I'm just unlucky I guess

Makes sense. Now that I think about it it's been a while since the last time I looted a non-legendary double barrel shotgun, since I'm lvl 70ish chances are they won't ever spawn anymore in the current playthrough.

Had that effect on a hunting rifle, I silenced it and called it Silent Boom

Yes, I got an unending double barrel shotgun, and specced it with the best damage mod I can give it. Does like 78 damage a shot and can pretty much fire as fast as you can click. The unending modifier (gives it unlimited magazine size) pretty much removes one of it's only balancing points for it's massive damage - the 2 shot blast before reload. I have have overcome enemies that I had no right to fighting at my level, such as sarge, swann, and the mirelurk queen. Not to mention as frivolous as it is, charging into a pack of ferals with a shotgun that can one hit kill most of them that you never have to reload is quite exhilarating. Named it the https://youtu.be/YnDpasFroGw?t=11s the instant I read what the unending modifier did.

Picked up a "Nocturnal Double-Barrel Shotgun". But since I have no use for double-barrel shotguns -- having a "magazine" of just two, the weapon is overkill for piddly stuff, but will get you killed because of the slow reload when dealing with tougher foes -- I just filed it away with all the other Legendary stuff I don't use. [I figure that when I retire, I can set up a museum to show off my Legendary weapons collection. Collect some admission money and get at least some utility from all that junk.]

The DB shotgun is amazing, The only legendary i've ever gotten is a quickdraw, but i don't evveen use it.... REALLY wanna get a two shot.. The damage would be insane, lol

I have one. I forget which legendary perk it has. Freezing maybe? I don't know. I've never used it though. I have an explosive combat shotgun with a drum magazine, so I'm all good...lol

I didn't realize they were hard to find. I'm on my first playthrough and I've had one since I was level 6 at least, though I'm not sure where I picked it up.

Edited to add: Sorry, misunderstood the post and thought that any double-barreled shot gun was legendary, rather than it being a quality level.

Had a few actually but i am no fan of double barrel shotguns, hate stopping to have to reload them every couple of shells (unless it was the infinite ammo capacity affix)

I did find one that does extra damage to bugs, one for mutants, I think one that did radiation damage (useless) and one that did extra limb damage. Of course I vendored those when the rng gods blessed me with a combat shotty that fires 2 projectiles per trigger pull AND one that deals explosive damage, this has been all in the same playthrough.

Think the double barrel ones tend to be replaced more and more by the combat shotgun as you level up.

You also get far more legendary at higher levels.

Had an explosive combat shotgun in previous game.

In this I just got an bleeding minigun, Swan never left the pound. Stopped firing then he was at half health, then hit some gunners who went down with one swipe over them.

For double barrels ones, never-ending must be awesome as they have very high rate of fire but you need the reload after two shots.

That seems to be the case.. I had a look at the leveled lists, plenty of DB shotguns spawn in raiders inventories up to lvl 7, then they're almost completely replaced by the hunting rifle, then again by the combat rifle at lvl 28. At lvl 70 I have little to no luck to find one. Pity.

I have both a never ending double barrel, it can fire silly fast, like 10 rounds a second on macro (highest dps weapon I have actually), and a wounding double barrel as well.

I've got a Wounding double barrel....it's pretty awesome though I haven't been using it lately.

I got a few, best one I got was explosive though.

The real boomstick.

Just found an irradiated shotgun in the capsized factory in glowing sea.