I know that I am late to the thread but I have only recently joined ARFCOM.
I have noticed that my Kahr CM9 is a fairly ammo dependent. It will shoot most ammo well but it really likes Aguila 117gm HP ammo. A while ago I was trying different brands to see if the all fed reliably and were pretty accurate. I looking to see if I could get by with some cheaper self defense ammo. I shot Federal HST, Remington Golden Saber, PMC, the Aguila and some regular, old WWB. They all ran reliably but the Aguila was far and away the most accurate. It had the best group of the bunch and made a regular customer of Aguila whenever I can find it.