Having read the Marlin post at length, it seems that CCH is easiest (read successful) on the older low carbon steels. Turnbull and others evidently have found a way to color the more modern, higher carbon, and harder steels...or have they? I wonder if the CCH process on an action designed for high chamber pressures is actually compromised because the necessary tempering temps required to restore the original strength would also remove the case colors? In other words is a pretty action actually weakened in terms of modern steels when case colored by any heat induced method. Or do they use cyanide or something else to achieve the appearance of CCH only. Many questions and not much chance Turnbull or others are going to cough up any secrets... Steve
