After my reply to them, they wrote me back saying they did check the primer seating depth and that it was within SAAMI specs. I replied that that measurement was useless as the primer had already been struck by the firing pin, so yes a second strike will probably set it off. They also said that the primers they are using are very hard which I replied so are the CCI and Wolf that I use.
They then offered to send me a new box from a different lot number but feared I would have the same problem due to the "hard" primers.
If I send it back to Kahr and they test fire it with some other brand and it fires, then Kahr will say it's fine.
Round and Round we go
