Another Timney Fan
I put a Timney trigger in my Ruger 77 Mk II .270; it went in easily - just a little relief for a perfect fit on the safety mating surface. It took about 20 minutes to do the job, and the trigger is superb. It has no takeup travel, and no travel after letoff. I set it at 3 lbs. 4oz., because it is a hunting rifle and that's what I consider to be a minimum safe pull weight while wearing gloves, which happens in my area during deer season.
My wife tried it, and after one-five shot group asked me for a Timney for her birthday present, on her Ruger 77 Ultralight .243. The result was the same, and she is totally happy with it.
The trigger on my early Ruger 77 (tang safety) was factory adjustable - long takeup travel, or long takeup travel with rough spots, and long or longer post-letoff travel, as you like it (NOT!). On that gun, there is a link arm from the trigger to the tang safety that needs some internal wood removed when changing triggers. There is also some adjustment in the bedding wood under the front of the Timney because of a small dimensional difference. The original install took me about 45 minutes due to the changes in the internal stock clearances. But the end result is the same as the Mk II rifles; my Ruger tang safety .257 Bob now has a great trigger, and will make one, 5-shot hole at 100 yards (when I'm having a good day!).