OldmanFCSA said:
Heat does not immediately stop traveling down the neck - it proceeds down the case until the cold of lower case body normalizes the hot of the annealed area. Try it, anneal while holding in your fingers, then continue to hold in your fingers until the temperature normalizes. Then as you drop it because it is too hot to handle, tell me "Once the heat source is removed annealing does not continue to travel down the neck."
This is absolutely true, heat will continue to travel down the case even after you remove the flame from the neck/shoulder junction. However, the amount of heat that remains at the neck/shoulder junction that travels down is not enough to anneal the body or the head of the case - this is why quenching is not necessary.
Again, using the finger test means nothing but if you want to do a real scientific test, paint 400 degree Tempilaq down the length of the case - I have done this numerous times. If you do this, you will see that neither the head nor the body of the case reach 400 degrees which BTW is not enough to anneal. THIS is why quenching is not necessary.