Sounds like a fluke occurence. Every manufacturer has a few. That's why you dryfire and shoot a gun several hundred rounds before you trust it completely. And there is nothing wrong with dryfiring most centerfire guns. If there was the manufacturer would warn against it. Do you think they don't know what will damage their guns? Do you think they want to do free repairs?
IMHO, the LCR has as good a DA pull as any Colt or Smith I've ever tried and better than 90% of them. Shoot what you like and trust. For me the KLCR is the perfect balance of power, accuracy (even out to 50 yards), price, weight, size and trigger pull to be an excellent CCW.