It might not be a mold problem it might be a me problem. I have been casting Lyman 475 gr. 45/70 bullets and it seems I have a spot on the middle band that doesn't want to fill out. I am using straight wheel weight and have tried casting at 650, 750 and 800* to see if it will fill out but It still seems to be there, even after casting 40 to 50 bullets at each setting. Mold is clean, mix is clean. I am a newbie to casting as I only started in 1992. Thanks for any info.
Steve E...........