I owned a 7-1/2" Ruger Redhawk for about ten years and then traded it back for a new 1911, along with a bucket full of $$, to the guy who originally sold it to me.
We saw him a month or so later and he wanted to know what I'd done to the trigger. He said he'd never fired one smoother than that. I hadn't noticed anything but what use I gave it must have just smoothed things up.
Guess ya' don't always know.