Ruger CYA on triggers is a fact of life, and the only Ruger I've owned for which I've never had to do anything to the trigger is a used Mk I bull barrel target pistol with Micro sights and aftermarket target grips that my grandfather bought for me for $68 when I was 16. I still have it and it is still a great shooting gun. I've had no trouble working on Ruger revolvers to improve their triggers, but have never messed with a 77 Mk II trigger and probably would not because its simplicity is on the order of that in pre-AccuTrigger Savages. I lightened one of those by putting a simple Rifle Basix trigger on it, and though it seemed fine in dry-firing, I had it fire on closing the bolt during one of the twenty test-flight rounds, so I moved to a multi-lever aftermarket trigger on it.
I'm sure spending more money to upgrade a used gun is probably not too appealing, but if you are thinking of it,
this thread may be of interest to you.