Ahhh the myth is reborn! I had heard this several years ago. I never tried it, being fond of my "seasoned" barrels, but my brother being the technology hound that he is, did try it and found it to be not true. It was no help in cleaning and shot less accurately than conventional lubes. He also found that the bore would haze or begin to rust quickly if it wasn't cleaned and re lubed the same day. On the other side of the coin, a friend used Ivory dish soap and had good results with it. Last time I spoke to him (couple years ago)he was still using it, and there were no ill affects.