I ran well over 1k rounds thru my compact 33 from Fed to Cci with zero ammo issues. It was a great plinker, I just moved on as it wasnt nearly as accurate as my Buckmark (which I expected) and i stopped using it. But while I owned it, completely trouble free.

And that seems to be what many owners have found, so if someone is having a high fail rate then a call to SW seems warranted.