i've had a xxxxBAS serial number s&w ppk/s for awhile now and i've never had a malfunction other than cycling ammunition by hand - the chamber indicator bar interferes with ejection at slow speeds. it still pulls the round of the chamber, but it drops through the magazine well rather than pop out the ejection port.

my ppk/s fires everything i've fed it so far, even cheap FMJ, although i haven't tried tula FMJs in it yet. tula steel-cased FMJs are the only round that my ruger lcp doesn't care much for, i've had 3 malfunctions out of 200rds with it. i trust my ppk/s with my life every day, although some days i carry the lcp as a back up to the ppk/s if i visit any cities.