I am shooting a Ruger M77 MkII .270 and an early (tang safety) M77 in .257 Roberts, both with Timney triggers. Right after I put the trigger into my .270 my wife shot it, and the result was a new Timney in her ruger 77 Mk II .243. I also have a Ruger 77/22 K-Hornet, but the guy who did the rechamber (CPC in Connecticut) also worked over the original trigger.
I really like the Timneys; mine are all set to 3lb-4oz. Up here in northern NY we often end up hunting with gloves on, and that's about as light as I'd want when wearing gloves! The Hornet trigger is 2lb-5oz, and its lovely!
The Ruger triggers are definitely well-designed, but I didn't like the weight and the amount of takeup. In the .257 bob, there was also a long overtravel. I do like the idea of being able to adjust the weight as well. I have a trigger pull scale (electronic), and it's pretty simple to "tweak" them.
The Timneys on the Mk II rifles were real easy to install - about 20 minutes each, with only a little jeweler's file work on the safety post.
The tang safety model was a "bear!" -Had to hog out some wood around the left side and tang, and the bottom of the action assembly. It took several fittings to get the trigger stable, and the safety working.