derrslayer,
Yes you are doing it right, but since the cylinder stop has to engage the stop notch in order to line the shot to the barrel, and the spring has to be stout enough to positively lock the cylinder in place, almost any revolver with real use, is going to have a turn ring eventually. I'm sure you could take it to a custom gunsmith and spend a lot of money to have it timed perfectly so as not to leave a ring, but, I would think, that unless you are a collector, it is just a sign that someone has had some real fun with the weapon and I wouldn't worry about it to much. I have owned quite a few revolvers and I have never had one that didn't get a turn ring after a few hundred shots.