This sounds like weak mag springs to me.....Well, I hate to say it but the gun has issues. For starters it wouldn’t even chamber an XTP from the mag when hand cycling. Then the Remington UMC ball ammo I had would lock it up. Round would jump up like it was going to chamber, but it would be at such a hard upward angle that it would get stuck. Ok, so I figured I’ll just shoot it until it starts to work. As the gun got dirtier, the rounds started to nosedive as they hit the feedramp, or just plain get stuck horizontally with the slide pushing on the back of the casing with the nose of the bullet smashed into the bottom of the ramp. This was causing the gun to lock up at least once a magazine. The 7 round mag is totally unreliable, and too loose in the mag well. When your finger applies pressure to the base of the magazine extension, it causes the mag to shift and make the gun malfunction.
Im not too happy about this one guys, looks like my fears have been realized. I fired 175 rounds through the gun and it got worse as I went on. Any tips or tricks I can try myself? If I send it to Kahr they’ll probably charge me for any work as I am not the original owner of the gun.