Found this Article. I have ordered a box of the Platinum Tips to put up against the Partion Golds i currently have for my SuperRedhawk .44. Anxious to compare, but this seems to be some good info in this article.
http://www.fishandhunttexas.com/winchestersupremearticle.htm
http://www.fishandhunttexas.com/winchestersupremearticle.htm