I have to say that I find it surprising that some people are making such an issue about the accuracy of a 22 revolver designed for short range small game hunting and short range plinking. As has been stated, today most 22 LR and 22 WMR ammo/bullets both measure in at @.224" with the .224" measurement on the LR ammo being on the driving band of the bullet, so the bore diameter issue being discussed is really not an issue at all. In addition, I'm definitely not doubting my eyes or the data in the Am. Rifleman article showing that the 22 LR ammo was more accurate than the 22 WMR fired in the same revolver. Today's 22 LR RF ammunition has some excellent, both plated and non-plated bullets, with consistently sized driving bands powered by very consistent burning powders. I own 3 Ruger Single Six revolvers and all three shoot better with the 22 LR cylinder than with the 22 WMR cylinder, largely due to the ammunition used. All three of them prefer a specific LR ammunition, but once that variable was found, they are very accurate for the purposes they were built for. But again, none of them are target grade accurate hand guns, and I did not buy them expecting them to be.
With that said, I'll add that I doubt you'll ever go to a RF Bullseye Shoot and see very many revolvers on the line in serious competition. That sport is dominated by good RF semi-auto pistols shooting good consistent 22 LR ammo for an obvious reason. The semi-auto pistols are far more accurate than just about any 22 LR revolver including something like an S&W Model 17 revolver, which I have two of that are accurate, again for their intended purpose of being short range hunting and can killing hand guns.