Kevin,
Im just getting back to this thread. You are correct, with semis you have to make sure the stuff will cycle reliably. In my 10/22 I even use Subsonics, every once in great while it may not come far enough back to eject/recock.
So, if it was for hunting, I'd say skip them, unless you have done sufficient testing.
The Winchester T-22s always cycle in the 10/22 , 100% of the time.
As you probably know, it's an issue on a rifle-by-rifle basis.
I have seen two identical semis using the same ammo, and one cycles reliably the other doesn't.
I'd tell anyone to spend the few bucks on a box of 50 Winchester T22s.
It was about 10 years ago, my gunstore owner told me they were the only ones he used, personally, despite the fact he sold Eley, CCi, Remington and Federal 22lr. From then forward, I was hooked.
Whatever .22lr ammo, Buy a box, make sure you have the lot#. If they perform well, then buy a few bricks with the same lot number.
CCIs are good rounds, reliable, and I'm certainly not talking them down.
CCI makes a subsonic, as well.
And CCI has the cool re-usable plastic trays! I usually fill them with T22s when I find empties.