For what it's worth . . .
I have several Old Model Ruger single-actions. All of them exhibit "standard Ruger trigger pulls" with a little creep. I have used these for many years and become used to this situation, recognizing that they are not "perfect" but are products I could live with. In answer to my earlier question, I had decided they were "good enough".
Then I bought a used gun that had been "slicked up" by someone, allegedly a "custom 'smith". Among the custom touches present was a trigger that was downright dangerous. It had essentially ZERO trigger pull nor any creep whatsoever. If you didn't make the effort to cock the hammer "firmly" it would easily simply release whenever it felt like it. Bad news. I bought the gun for a good price, recognizing that it needed help. I took it to a couple of alleged 'smiths who refused to deal with it. I considered returning it to Ruger for attention, but didn't think they'd like a couple of the other custom touches although they were not associated with function and thus not a "safety" issue.
Ultimately, I found a 'smith who handled the gun for a moment and said he could fix it with little effort and modest charge, explaining what the problem likely was and how he would attack it. I left it with him, and it was returned to me in only a couple of days. He had performed essentially what IOWEGAN described. And folks, let me tell you it has the absolute best trigger I have ever felt on any gun I've handled, bar none.
I'd not attempt this operation myself, but I'd certainly recommend it to anyone with a Ruger single-action, even if the trigger is "safe" as it is. You would not believe the difference.