The first two things I would try with the Ruger:
1. Dry fire it and see if your sights "snap" up when the trigger breaks. If so, you are still having an issue with the DA trigger pull and/or the way the gun fits in your hand and/or the way you are gripping the gun (revolvers should be gripped even higher than autos).
Dry fire is free and you don't have to wait till the next time you're at the range.
2. Let someone else shoot the gun, preferably someone you know who is proficient with a revolver. If you have the opportunity, let several people shoot it. If everybody who shoots that gun shoots high, it's most likely the gun.
BTW, does it shoot to point of aim if you shoot it single action?
"An armed society is a polite society." — Robert A. Heinlein
"After a shooting spree, they always want to take the guns away from the people who didn't do it. I sure as hell wouldn't want to live in a society where the only people allowed guns are the police and the military."
— William S. Burroughs