It just so happens the 94 gun digest has an article entitled "Make an accurate 22 semi auto"
The article deals with a few models of 22 semi auto like the 10/22 and Browning autoloader.
What I found interesting was the Norinco knock off of the Browning 22 auto loader. This thing sells for less that $200 at Marstar. Maybe the author got lucky but his knock off was so accurate right out of the box he didn't do anything to it.