First, let me say that I’m a big Kahr fan. In the year that I’ve had my CW40 I have shot over 800 rounds with only one failure – a FTF in the initial 200 round break in period.
I bought a CW45 a little over a week ago. To date, I’ve shot a little over 500 rounds (all but 150 were reloads). In the last two days, I’ve shot three boxes of Speer Blazer factory 230gr JRN (one brass and two aluminum). In a dirty gun, I shot a box of the alum Blazers with one empty case jam on the barrel hood. I completely cleaned the gun and fired six magazines of both alum/brass cased Speers before I encountered an empty alum case jammed against the barrel hood.. A similar jam was encountered with the brass version in a previous shooting session. I then shot 50 rounds of my reloads (200gr lead SWC in nickel cases) with one additional failure to feed (unfired case jammed against the top of the chamber mouth).
I had similar, but more frequent failures in the first several hundred rounds. I wasn’t real concerned, because I was (and still am) trying to optimize the powder charge, seating depth, and crimp of my reloads to accommodate both revolvers and autoloaders.
This is just one instance (most work just fine and you just never hear about it) and I wouldn't let this particular gun keep me from buying a CW45. All gun makers have problems, that's why they have customer service depts. With that said, this gun will be going back for some tweaking after Christmas.
YMMV
Paul