Doug what is the process for your heat treat. Heat to a temp and hold it 45min per inch of thickness or some rule like that. Then quench right. Air, oil, or water?
what is your mtl 4145/4140?
edit: When I did the H13 stuff for that die. I heated it for 1 hour and air cooled it. I know H13 and 4145/4140 are not the same but jim has a book with all that crap in it.
edit #2 chuck norris is cool but mel gibson in mad max could probably beat chuck norris up anyday of the week.