I don't have one, but my shooting buddy bought one new, in the early to mid 1970's. It a 357 magnum model 15-2.
He has several barrels for it, from 2 1/2" to 8".
Far and away, this is the most accurate revolver I've ever fired. The 8" barrel with the vent rib will turn in 1" groups, using cast lead bullets, at 20 yards.
It was always more accurate than my S&W Model 29-2's that I used to shoot with him, back in the day. He wasn't as good a shot as I was. so I always out shot him, but I could shoot his Dan Wesson better than he could, and it was more significantly more accurate than my S&W.
I tried to buy it from him, quite a few times. Of course, he wouldn't sell it, and I never managed to find a nice one, at the local gun shows.
The big thing I remember about it is that he had to send it back twice, because it would go 'out of time', so that the cylinder wouldn't line, and lock up, in either DA or SA. This was common problem with the Dan Wesson design, and i saw it on several used Dan Wessons I looked at.
Also, unlike the S&W revolvers, the DA trigger on the Dan Wessons would 'stack', getting heavier as you pulled the trigger back, until the hammer fell. It was quite noticible.
The method that the Dan Wesson used to allow the use of interchangeable barrels, which was that the barrel 'tube' was screwed into the frame, and then the barrel shroud was slipped over it, and locked in place with a special nut, gave the barrel support at both ends, resulting in superior accuracy to the S&W revolvers, and indeed, all other revolvers.
The Dan Wesson revolvers were popular with metallic silhouette shooters, due to its fine long range accuracy, especially in 44 magnum.