That little knowledge can make your first range trip with your Kahr a nightmare or dream come true. Some of them feed anything and a few of them won't feed a thing and need to be sent in for servicing and a lot of them between the two that just need a few hundred rounds to loosen up. All the new ones come with polished feed ramps now to lessen problems. It's just because the pistol is so small resulting in the feed ramp being extremely steep, almost vertical to fit it in there, so there is not much room for error and bullet size and shape differences.
But as far as carryability in 9mm, it's got everything beat by a long margin, except for possibly the Rohrbaugh. But costs half as much, is readily available and has better sights and a little more heft so it doesn't beat your hand into hamburger at the range. It's also a good shooter up to 25 yards.
Mine hasn't missed a beat since it was new. Although, I've only tried WWB ammo in it so far, so that's what I carry in it. I will be experimenting with different loadings, because I do prefer 124 gr. 9mm.