10-20% these "automatic" rounds fire "lightly" so do not fully cycle the firearm for next shot - Federal Premium Champion Training - Rimfire .22 Long Rifle 40 Grain Lead Round Nose Rimfire Ammunition

EDIT: When I shoot this ammo from a semi-auto, I have light strikes about 1 out of every 5-10 rounds. What happens is that a dud round fires, but does not explode with enough force to completely cycle the bolt carrier. The next round does enter the chamber but will not fire. The gunshot sound of a light primer strike is also distinct and not as loud so you can immediately tell that something happened. This interrupts the shooting session by requiring manual chamber cycling and then having to decide what to do with the ejected live round. I do not believe it to be an issue with the semi-22 firearm, because I have used several other brands of ammo and never had this light strike issue, only with these 325 round boxes of Federal "Automatch" boxes. I believe this to be a pure ammunition quality issue. Maybe I just happened to get a bad lot. For this reason I will not purchase this type of ammo again.
The good thing about this ammo is that it fires very cleanly, leaving very little residue on magazines in the chamber+barrel compared to say blazer ammo.