Overall, the CCI regular mini-mags are one of the better ammunition types. For a while, there were lots of FTF's with Remington Golden Bullets. Now Remington seems to be paying more attention to their quality control. The Remington Thunderbolts just plain su*k due to FTF's and accuracy is so-so. I generally get 1/2" to 3/4" groups with them in my rifles at 50 yds. I just get tired of ejecting FTF's in semi-autos. The Federal Champions do pretty well for medium cheap 22 ammo and my Ruger pistols like them. My Ruger Mark II has always preferred Federal copper plated ammunition.
As you know, 22's are finicky in terms of what ammo they like best from a functionality and accuracy perspective. Generally speaking, the standard velocity ammunition will shoot better than the high velocity stuff. I picked up a bunch of old PMC ammo and have been getting pretty good results with that stuff. Wolf Match and Match Target is very good. As was mentioned, in general, the higher the price, the better the quality control and accuracy of a particular round excluding things like Stingers and Velociters.
For hunting, you really aren't getting much of an improvement in practical killing power when compare standard velocity vs high velocity ammo. But, I do like Velocitors. Generally the standard velocity stuff shoots more consistantly.
Buy some different brands and start shooting with your 22's and see what does best. Shoot at 50 yds with rifles. Much tougher to shoot well at that range vs. 25 yds.