There is a way to handle most any revolver that will prevent this drag line from going all the way around the cylinder.
That is, if the gun is mechanically sound. I agree with Mike when he said, there is a lot of variation in the bolt timeing between guns of the same make, and guns of other brands.
But that doesn't create the drag mark all the way around the cylinder.
Besides the 25-5 pictured, which I bought new and UN-marked, I have a much older, 1956 S&W Mdl 28 that does have a light drag mark all the way around the cylinder. NOT from normal use, but because who ever had it before me opened and closed the cylinder incorrectly. Therefore causing the problem. Since I have had this revolver the drag mark has become much more obvious, but only in the area where the bolt drags on the cylinder during normal operation. The 360* drag mark has never increased. Sorry no pic.
If one takes a S&W, or any 6 shot DA revolver, and cradles it in his/her left hand with the cylinder open, holding the middle finger of the left hand through the frame opening, in the flute on the far side of the cylinder, and the thumb in the flute on the opposite side, then holds the cylinder in place while pivoting it up and into the frame, it will index with the bolt in the notch every time.
This is what I do. You saw the pic, NO 360* DRAG MARK!
If you simply close the cylinder, and do not pay attention to indexing it, then rotate it till the bolt locks into the notch, you, not the gun are creating the drag mark. This is true of S&W's, Colt's, and others.
I have owned numerous S&W's, a couple of Colts, and several Dan Wessons. All bought new and UN-marked. Other than the drag line left by the proper mechanical functioning of the locking bolt, there was no 360* drag line on any of them.
Conversly most of the used revolvers, DA as well as SA I have bought have have had 360* drag marks.
Let me rephrase my comment.
Drag marks that go ALL the way around the cylinder may be common, but they are not normal in a revolver in proper mechanical condition.
If it was normal, then all my guns would have full circle drag marks reguardless of how carefull I treat them.
I'm not a fanatic about how I treat my guns, you can see that in the pic of my 25-5. But, I detest 360* drag marks.