No, but the method was developed by Fred Barker, who used heat-temp paint to test it. (I've also tested it the same way.) Hold the case in the middle of the body with your fingertips, and when it's too hot to hold the case is annealed.
This is exactly the same method Charlie Sisk used in the example cited in the book, which shrunk groups from over 2" to 1/2". Of course, that was in one of the accurate rifles Charlie builds, shot on an indoor range.
On the anti-loony side, I've found any rifle capable of averaging 1-1/2" for 3-shot groups at 100 yards is accurate enough for hitting big game in the heart-lung vitals to at least 400 yards.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
