There lies the heart of the Dan Wesson enigma.
It's strength is also it's main weakness.
The truth is most guys don't change barrels. At least not much. The innovative feature that makes them so unique, really isn't that great once the novelty wears off. It's too much of a hassle to re-sight the gun in every time you change barrels. That's why you find all those pistol pacs with 3 unused barrels. Or you might try it once, but once you change back, that's usually the barrel that stays on the gun. The feature while unique, really isn't needed by the average shooter or understood.
Please understand, I am a huge DW fan. I currently have a revolver in every factory caliber ever produced, except a dedicated 38 special. I also have multiple barrels for each gun, mostly as collectables, but I don't change barrels much, if ever.
For a long time, the DW revolvers were cheap enough to just buy another gun in the barrel length you wanted. Strange, but true.
Instead of changing barrels, I prefer a little locktite on my barrel, and changing shrouds between iron sights & a scoped shroud. With the barrel secured with locktite, you can switch back & forth without re-sighting. A little heat will break the locktite if you ever do want to change barrels.
I have found I also prefer the 6" barrel for iron sights only and the 8" for a scoped gun on guns I don't switch shrouds on.