I've had 3 Kahr Pistols, a K9, P9, and a P45.
And had a total of 12 Kahr mags, 7 in 9mm, and 5 in 45.
After doing the factory suggested 200 round break in, I never had any problems at all with the Pistols or mags.
For the record, the 45 had a failure to lock open in the first 25 rounds. After break in it fed everything I ran in it.
The 9mms had 2 cases of failure to go fully into battery, again within the first 50 rounds of break in. After break in no more failures.
Eventually I traded all three off to get new stuff, I really regret trading the K9, it was a good gun.