I easily get seven good shaves out of most kinds of blades. My beard is not real heavy and I do a two-pass shave most days. While I have always left the blade in the same razor for all seven shaves, this morning I tried transferring a used blade to a different razor after four shaves and the results were terrible. The blade pulled uncomfortably and felt rough. I also got several small nicks. Is this just a fluke or does the blade conform itself to the characteristics of the razor in which it is first used thus making it unusable in a different razor? Has anyone else experienced this phenomenon?