I keep a box of stingers around to try in different 22's and have never had them to be very accurate,no matter the gun shot from. I think they're going too fast to be accurate.Of course this is my experience and I ain't no rocket scientist. I've tried the 22 mag hyper velocity rounds and have found them to be wanting in the accuarcy dept also. The mini mags are a different story. They may not be the most accurate rounds that I've shot but they're pretty good. They consistently go BANG the same way. Not like some of the bulk boxes.You know the ones that go BANG,pop,bing,BANG,click(didn't go off),POP,etc. I've not tried the Rem target rounds.
I tend to mostly agree with HWD on the Stingers except I have an old High Standard pistol that shoots them nearly as well as many target rounds and my Ruger 10/22 does OK with them, at least as well as most high velocity rounds.
The Mini-Mags have not been my favorite in the past as they have not been very accurate in my guns until recently. I was given a couple hundred Mini-Mags of recent manufacture and they grouped very well out of my single shot Remington, at least as well as its traditional favorite.
The Remington Target rounds (those with the blue and green background and not the yellow which are really Eleys) group well in my guns but not well enough to justify the higher price. They are no better, or at least not much better, than the preferred high velocity load for my my guns. As these rounds are over twice as expensive as the best high velocity ammo, I don't mess with them much. I've got a bunch on hand from 4-H but even there we switched to Federal Gold Medal as it has been more accurate for us and, more importantly, we get a great deal on it.
When it comes to accuracy, particularly with the .22LR, it seems that the slower bullets tend to be more accurate, though some of those HOT .17's can group pretty well (with no wind). I've always had very good luck on my grouping with the 550-round brick of Remington Golden Bullets.
I've not had super good accuracy with Stingers. In fact, I bought 2 boxes and only shot 1 of them.
I think the CCI Mini-Mags (and Maxi-Mags in 22WMR) are very good. I use them for my squirrel hunting. They have very uniform bullet noses- not all dented like some of the bulk packs of 22 hollow points or solids.
I've also had great results accuracy wise with CCI Blazers. The worst ammo I've tried is the Remington Golden Bullets. That "gold" paint that they put over the bullet just gunks up actions and they seem to burn dirtier.
Just goes to show you how completely different two rifles can be. I'm sure a huge part of it is different actions, as autos are typically much pickier than most other actions. Probably also has a lot to do with chamber differences. Of course, that's why we try a bunch of different ones in each rifle, right?