The wild card in this is the post treatment time and soak time.
In my younger years I worked for a metalurgist in spokane by the name of Bob Williams. Bob owned Pohl spring works and I did what I could to pry knowledge from his head.
While it is true that the 1k will potentially affect the draw, we don't know the potential carbon migration, chill slope....etc.
There's obviously some surface hardness increase but at what cost? If anyone is curious, treat a recoil lug and make varying depth of grind across one side. Smack it in the tester and see how much if any change in RC is had....and how deep.
I don't recall exactly what our time and temos were for drawing 4140, but 4 hours at 600 rings a bell. A rifle action is no where close to that hard.
