I'm having problems with two Ruger SR22 pistols.
Pistol 1) Maybe 50/50 if the extractor will grab and extract a live round (always extracts spent cases). A few rounds (out of a couple hundred) were a misfeed where the bullet would kinda get jammed into the chamber sideways and the slide would crush the case .
Pistol 2) Same misfeed problem as above but a ton more of them, maybe 15% were misfeeds (again out of many magazines worth, at least a couple hundred rounds).
I'm thinking a bad magazine may have been causing the misfeeds. One magazine was a little tight so you actually had to barely push the rounds in, the other magazines you could drop the rounds in (when holding the follower down).
I just got off the phone with Ruger, they're claiming that it's normal for a firearm to not be able to extract a live round from the chamber. I asked "How are you supposed to make the gun safe during a ceasefire?" and they didn't really have an answer for me. I can actually see that the extractor on both guns kinda disengages from the rim in the last millimeter or two of travel when the slide is closing.
I've already decided I'm sending the magazine in for replacement. I haven't decided if I should send one or both guns in as well to be checked over. I did find mention of fixing the extractor on another forum by filing a couple thousandths off the extractor or the extractor notch in the barrel (I would have to research a little to make sure I filed the correct item by the correct amount).