I have a H&G 68 mold which is a six cavity. I have used the mold very little but it is around 30 years old.
I got it out last week and cast some boolits with it. I had trouble getting fully filled bases and many times the cavity was 1/2 filled. The mold has the trough on the sprue plate. It appears as when one cavity was filled the lead would spilled over into the next cavity the lead would solidify before the cavity was full. I got the best results if I filled each cavity individually but it was impossible to keep the lead from spilling between cavities. I was casting at 720 degrees F.
With a mi-hec 4 cavity mold this was the right temp. I could cast better and more boolits with the four cavity mold than the six cavity H&G.
Any suggestions that would help?