Ruger 77 triggers from the past were adjustable and pretty decent. The newer MKII triggers were "improved" and made non adjustable. I won't go into a rant about that.
The answer is a Timney tirgger and sear. They come together as a set. They are adjustable for engagement, overtravel, and weight and are the equal of any really, really good trigger. Any Ruger I intend to keep has a Timney installed. If you look at it from a financial pont of view, the Ruger costs at least $50 less than most bolt rifles, add a $60 Timney trigger and you've only got about the same money in it.