...
In terms of accuracy, here's what I find:
Tested in a 10/22, plinkster 702, ruger 10/22, walther p22, Norinco JW25a, and Mossberg 26c I found:
1) CCI Blazer
2) American Eagle
3) Fiocchi 40g standard
4) Thunderbolts (FTF's and jams)
5) Dynapoints
6) Win333 <--- Worst accuracy ever omfg never sight in a scope with this sh it
I tend to stay away from high velocity rounds because I find the accuracy not as good. This could all be in my head though because I've never done any semi-decent testing.
EDIT: I swear by those Fiochhi's as the ultimate .22lr round in my JW-25a. I have never had a FTF in 3000 rounds and this year I bagged a grouse at 100m standing (and shaking with excitement).