Funny, I had a very similar experience back about 7 years ago when I bought my Kahr P9. I would be able to get through a few rounds but every so often it would stovepipe. I thought it might just be my grip, but could not get it to feed more than a magazine or two without this happening.
I called customer service, and they did the same thing. I sent my gun to them Fedex and it was returned to me 2 days later. 7 years later it has never happened again. I am really happy with my Kahr and their customer service. I understand things having problems every once in a while and don't expect everything to always be perfect, but its how the company handles these things that really shows quality to me.