P45 Slide Problem

Using top manufactured ammo, I had multiple jams & stove pipes & and the slide not locking after an empty mag. Gunsmith could not fix the problem(s) and suggested I send back to Kahr, which I did. Kahr replaced (at not cost) the slide. I have now run thru more than 200 rounds with NO jams or stove pipes. Good customer service, but I was disappointed that I would have these problems with an expensive NEW weapon.