I shoot master class scores with my early 80's vintage Mark II when I am in peak Bullseye shooting form. Many rounds through and its still going strong.
FWIW, I talked to an American Pistolsmith Guild member when I had him cut my SA slide for a set of BoMars. I was inquiring about having a Douglas barrel installed in the Mark II. He told me, "buy a box of 50 rounds of every kind 22 ammo you can find and shoot the pistol off the bench. Its been my experience the Ruger barrel is as good as any out there."
Coming from Al Marvel, I did that and never looked back.
I did do trigger work to it and mounted a red dot, some grips. If I miss, its my fault.