Read a article somewhere, think it was at Sixguns.com. But this article said that flame cutting is the main reason why Ruger dropped the Supermag. Went on to say that .357 Magnums are the most vulnerable to flame cutting. They also said that in the long term, the damage seems not to get any worse or the amount of shooting necessary would exceed one's life span.
[This message has been edited by Robert the41MagFan (edited May 06, 2000).]