I only use one cavity at a time. And use a second mold as a support for the end of the wire while I am positing the hook and wire in the mold. I move the hook eye with the wire as far away from the opening as I can, I want the cavity to fill as fast and free as posable. When I am ready I turn the mold on its side and pore lead in a puddle on the side of the mold. I let that lead set there to the count of 10. That warms the mold,hook and wire to help the lead fill the cavity. I also use pure lead, wheel weights or scrap may have impurities that will give you problems with the cavity filling out.