I have a dagger that is 11" long (blade.) I did a clay differential quench. It is 1/4" thick, 1 1/4" wide at the widest, and it has a small fuller. I quenched in Maxim DT48 after soaking at 1480f (+/- 5f) for 5 minutes. I did the stress relieve temper last night at 350f for 90min. I was thinking tempering at 450f for 1h x2. This is for as friend who is a hunter as he wants a last ditch weapon in case he is attacked by a bear. The last thing I would want is a broken blade. This is a pretty big chunk of steel. Is Rc 57/58 appropriate here? Recommendations?