I have a new to me lee 309-150 FP and no matter what I do I cant get complete base fill out ! Yes Its clean, vents are clean ,the top edges of the blocks have been slightly beveled. I've tried different temps, different alloys even 50/50 ww and lino with babbit added gives less than perfect results! Whats next? what havent I tried or am doing wrong? I am laddle pouring and never had issues with my other moulds no matter how I pour as long as the alloy ends up in the sprue hole.Maybe open up the sprue holes alittle? Help
Tim