A couple of years ago we did some good tests of standard priced 22 ammo. We used two Brno rifles, A CZ and a Model 69A Winchester, all with quite good scopes, using best rest we could get, all shot at 50 yards in five shot groups.
With the best ammo we made some groups of half inch or less. I don't have my notes here, but far and away the worst was Wildcat!
The top few were close, with amazingly, Winchester 500 pack running close to top, but Winchester marked Target, was one of the worst. American Eagle was also in there but consistently best was CCI, with a toss up between the standard power and Blazer. Again, from memory, Lightning was an also ran.
Some interesting things noted.
Three shooters all did very close to the same.
All rifles shot them very close to the same order. That is, excellent in one, excellent in all rifles. Wildcat worst in every rifle!