8 or 10% Cobalt or Carbide. But you will break your tap if you plan on threading it. You could buy a spare and anneal the back side where you are trying to drill. Then see what happens. To anneal something is to soften it, whether to relieve stresses or to make the material easier to work with. Ferrous materials, like mild steel or carbon steel are annealed by heating it to a critical temperature and then allowing it to cool as slowly as possible. The slower, the softer. Insulation or controlled heat is sometimes used to really slow down the cooling. I would try it because the factory triggers like the stevens are cheap.
http://www.gunshack.com/index.php?ro...&product_id=51
after several tries, fumble fingers gets his post right....
Bookmarks