My current 308 Montana had FTFire issues as well. Wasn't frequent or predictable, but the last time it happened I had walked up and was balancing on a fallen birch tree to get a clear shot at a grizzly feeding on devil's club berries... Fortunately it didn't hear the "click" and the next round did fire. Kimber sent me a new firing pin and spring. Has never happened again in about 10 years.