Picked up a case of CCI MiniMags (along with a case of Standard) last November direct from Federal for our state Appleseed shooting events.
The MiniMags are great in most factory 10/22's.
So far, every one has gone bang, and none had problems going through the magazines or chambering.
I can tell you I've personally used several cases of MiniMags in the last few years and never had a failure due to the ammo in either an AR-based .22 or a S & W Victory .22.