I have a new mold that I have tried to cast with but am getting poor results on one cavity.
This is the 3rd attempt at using this mold. It's a 4 cavity Accurate mold 35-115Z (9mm 115gn TC). I have cleaned the mold a couple of times.
I get about a 80-90% reject rate on cavity 3, and 30-40% on cavity 2. The base does not fill out.
Lead is 92-6-2. Temp is 740F (PID controlled), mold is 400F. I have tried between 390-420 for the mold temp, still the same issue.
Lee 4-20 bottom pour.
I have tried with fast and slow flow. Start at the back and cast to the front, start front and work to the back. Tight and loose sprue plate.
Just can't get good fill out of the base on that cavity. 1 and 4 are perfect.
I know these molds don't come with vent lines between the top and sprue plate, could this cause the issue?
Any idea would be appreciated.
Thanks