I had a couple of the early Guardian .32's. After several trips back to NAA, they replaced one with the other, but it still had problems. I traded it for a NAA Mini-revolver. IIRC, ball (FMJ) ammo was the most reliable in both of them, not that it's reliability was anything to write home about. Don't take that as a slam on NAA, most new models have their teething problems, and I did trade the last one for another NAA product.
However, I currently own 2 Seecamp .32's. So far, Winchester Silvertip and FMJ, as well as Speer Gold Dot, have been reliable. I had one misfeed on the last round of the mag with the FMJ. I've been through most of a case of the Silvertips with no issues. I'm currently using the Speer Gold Dot, and have had no issues with it. Frankly, it seem to have a little more uumph to it, and I just like to carry Gold Dots in any personal weapon I can.