To get a nice smooth "crown" on your lead you will need an anvil and a setter. Your anvil can be any soft piece of metal such as brass, copper, aluminum, etc. Take a 1/4-in drill bit and just lightly drill a concave place in your anvil material. Not too deep. Just deep enough to "dish" it. Next, take a 1/4-in bolt and concave the end of it just like you did your anvil. Drill your hole in your lip, place your lead through the hole and set it on your anvil. Using your setter (bolt), take a hammer and flatten your lead. Makes a nice, smooth dome.
Gene