My experience with the Single Ten appears to be quite different from others. I did not find the one that I briefly owned to be very accurate at all. Quite the contrary, it was totally inconsistent. It would fire a 1.5" group at 20 yards, then a 4" group with the same ammo. I tried every trick with 22 rimfire that I know to get it to shoot well, even changed out those fiberoptic sights because I thought they flared in my sight picture. My old Bisley model will consistently
shoot accurate groups in the 1.5" or less range at 25yds, with a wide variety of ammo. I also have my first Single Six, a 6.5" Liberty, that will nearly equal that and one OM that is pretty close. I was firing the older Single Sixes against it as a control to be sure it wasn't just my shooting.
I suspect there was some issue with several of the cylinder borings in that Single Ten, although there was no evidence of bad leading. The throats seemed a little on the large side, but I guess all 22 revolver cylinders are straight through bored. Whatever it was, it is someone else's issue now. Come to think of it, I may be the only person I've ever seen report having trouble getting acceptable, much less comparatively decent, accuracy out of one. I don't think they have a different bore diameter than the standard Single Six. I can't see why Ruger would make that effort.
Here is my earlier post about the issues I had with it:http://www.rugerforum.com/phpBB3/viewtopic.php?f=32&t=151587&p=1533823#p1533823
I'd be interested to hear if anyone else has experienced poor Single Ten accuracy.