My ruger convertable shoots the 50 grain Federal WMR most accurate. About 1" at 25 yards. After that, all the other brands or 22 WMR and 22LR are all the same, about 2 to 3 inches.
Because of the cost, I still shoot .22LR most. I still hit football sized rocks at 50 and 75 yards off hand, and thats all I need to enjoy a sunday afternoon.