I use a spyderco system. It provides a 30% and 40% angle. I've made a practice of using 30%'s and I guess the results are not unacceptable, but nothing I'd write home about. However, today I used the system at 30%'s to sharpen my Mikov lever action. Now I have read that the steel on the Mikovs is nothing to write home about. But........................ this time I really think I made it hair popping sharp. I don't believe in dumb luck. Any ideas of what may have happened? Thanks