I have used this method in the post by UncleAlps working on every Mk II and Hawkeye that I have owned in the last many years and it works great. It removes all the creep and will usually get trigger pull weight down to 2.5 to 3.0 pounds. In a couple, I did need to change the trigger spring to achieve the pull weight I wanted. Work slowly and don’t remove too much at a time. I have not caused an unsafe trigger on any Rugers that I have worked in this manner. It just works!
Adding a PS: I am not a gunsmith and not really very mechanical. But I can read and that’s all it takes.