I finished the breakin process for my Kahr CW9 tonight. As of now, it has fired without a single feeding, firing, or extracting problem the following types of ammo (all 115gr FMJ unless otherwise specified):
CCI Blazer Brass
CCI Blazer Aluminum
Hornady 124gr JHP
for a total of 300 rounds. Looks like keeping it cleaned and lubed is all one needs . . . now if I can just learn to shoot it well . . .