Me too. But not just with Ruger. My most accurate 22 mag was a marlin 25. My least accurate one was another marlin 25, roughly the same year of manufacture although the better shooter had a nicer stock but the barrel appeared to be the same. I wonder what the difference in group sizes is with each model 10-22 or if it truly is random. My target model is terrible (hardwood stock, long stainless barrel, no band) . But a friend bought my great uncles standard early model 10-22 many years back and it was better. Looks like hell but clearly shoots better.
Here is another thing we are not talking about.....the gun itself.
Can we really "blame" Ruger, Marlin, Savage.....whoever for a "used" gun. This is something I go off on with surplus stuff.....you can't say that X or Y is garbage after it has been pulled out of a warehouse in who knows where smothered in cosmo, then you come along 70 years later.....shoot it and say, well these are all garbage and can't shoot for anything. People that do this are fools......the same goes with a "lowly" 22....the gun that is usually someones first gun....and the Ruger 10-22 is really the first "real" rifle many people get. How well do they take care of it.....are they putting the steel cleaning brush in a drill and running it up and down the barrel for 20 min at a wack.....then wondering why it does not shoot well and passing it off to someone else that will put a new carbon fiber wizz bang barrel on it......we don't know how it was taken care of.
In commenting on how something shoots I will always state if I am owner #1....fresh out of the box, new in box....whatever.
You can't gripe about how accurate a used gun is with any validity.....it says nothing about the initial product as you don't have the initial product.