It appears Mike solved this problem regarding heat treated steel with Winchester Model 21's and Winchester Proof Steel.
. It appears Winchester used very high quality steel making their guns. My question now refers to the new Model 21 made by Galazan: is the steel used by them to make all these 21's as good as Winchester proof steel and what is the make up of their steel and where do they buy it or produce it??

Socialism is almost the worst.