Purple .45 Grizzlies

I have a .45 Grizzly Winchester Magnum that is purple in colour , its in the very low A000100's serial number ranges , I' ve been told that the colour is a phenomenon caused by the amount of silicone in the metal and then the reaction in the blueing process . Next blog will be a factory letter included with one of my Grizzlies stating the reasons why the factory elimated factory ported barrels .