Very nice work....now it looks like I'm out of a job.

You will find a lot of things will affect the colors, ratios of bone wood, temp of water, charcoal size, quench temp, time at temp etc etc etc.

I started doing CCH about 10 years ago, took me about a year; lots of quenches and several dozen turn of the century books on Case Hardening to figure out what was happening.

I would take mild steel and surface grind it dead flat, then measure warpage and depth of case at different quench temps & water temps.

Right now I pretty much have the Winchester and Marlin colors down pat, still working on the Colt & Parker colors.

Have Fun

V/R

Mike