Fair Enough. I can only tell you what my experience has been as I encountered a similar problem. I would say your description is fairly accurate, and I would say the gun does not carry up properly in DA. Apparently a common problem, but after a lot of careful examination I was not able to cure it. The reason? I could see that the problem was caused by wear. Unfortunately the wear was in the main parts of the gun such as the cylinder, the frame, the trigger and hammer. That's the whole gun. I confirmed that if cocking at a high speed the gun worked "normally" but would not pass a slow DA test as any revolver should. The only exception to this rule is that some cowboy action revolvers are intentionally adjusted for fast SA cocking, however I consider that work specialized and unsafe for most shooters. In your case, how could you justify replacing the cylinder, the trigger not to mention the frame? That is, if those parts were even available. In my experience with other revolver makes, I've never seen the kind of wear that I found in Dan Wessons. Granted it was probably shot exclusively with .357 ammo, but that's still not an excuse in my opinion.
Any revolver should pass a slow carryup test. This consists of applying light pressure against the rotation of the cylinder, and very slowly pulling the trigger until the gun carries up. Carry up should take place before hammer drop in DA. Otherwise DA operation is unsafe. Carry up should take place at the same time or just before the hammer cocks in SA. Many revolvers will appear to shoot normally if fired briskly, but you are asking for trouble. Have it checked by someone you trust and let us know.
Wire
My new to me 15-2 has a DA trigger problem I need help diagnosing. Often when I pull the trigger slowly in DA, as soon as the cylinder locks up the hammer stops dead. To get it to travel beyond this "hitch" takes a great deal of pressure to the point of me not wanting to force it and do damage. It happens with the cylinder open or closed. If I pull the trigger quickly it rarely happens. SA is not problem. The B/C gap isn't the issue and the gun is thoroughly cleaned including under ejector star. Where should I be looking? EDIT: I disassembled the gun and found the hammer had heavy wear/gouging on the right side bottom of the hammer where it's rubbing the frame. I could stone and polish it smooth but I wonder if it would lighten the hammer enough to cause light strikes?
