Lost count of how many rounds I ran through my KP345, but definitely into the K's. No problems at all, last visit, I TRIED to jam it up, FTE, FTF, anything...no luck. I staggared 200gr FMJ with 230gr FMJ, along with 230gr HP's all from different companies. I fired in quick succession without grouping in mind, just trying to fire rapidly to see if different rounds and grains would do anything...NOTHING!! I love this gun!! On a side note, I also did this with my XD and Glock...absolutely no issues with the XD, but had 2 ejection issues with the Glock. Funny but I was anticipating Feeding issues, not ejection issues.