As I've stated before, I only really expect it to operate 100% under ideal conditions, meaning: spotlessly clean, well lubed, warm from being in my pocket, firing a load it likes, and only a magazine or two. That's why I was so excited to get close to 50 rounds thru it before a jam; for a gun designed for this purpose, that's well beyond what you would ever need in an emergency.
As a comparison, I never shoot a lot of rounds in one session with my scandium J-frame .357 Smith & Wesson, as it gets a mite uncomfortable after, oh, about 1 round.
However, I know that every single time I stroke the trigger the gun will go off. I know this because I've fired over 1000 rounds thru it, and it has worked every single time.
Rant follows:
I reject the very notion of a gun that is "carried often and shot seldom." If you're carrying a gun for personal protection, you owe it to yourself and, more importantly, the general public, to be highly proficient with that gun. Not just guns in general but that particular gun. That means you have to shoot it a lot.
Maybe that means you only fire a handful of rounds at a time, but you better do it often. I know, people are busy, there's not enough time, I can't get to the range, it's too expensive, etc., etc. I feel the same way.
But if you're carrying a little gun like an R9, it is that much more important to train often, because it's that much harder to shoot well. If you can't or won't shoot often, do us all a favor and carry something bigger, that way you might actually hit what you're shooting at.
So I'm planning on shooting my R9 a lot. Maybe not all at once, just 20 rounds or so at a time, but it damn well better work right!
Rant off.