Do I need a new mold?
We've had this ball-head jig mold for 20 years or more. It has always produced fine for us. However, today, we tried to pour some 1/16 oz. ball heads (with collar) and most of the pours resulted in having little or deformed collars. Trying the 1/8 oz. cavity, no problems. The 1/32 oz. no problems as well. Seemed like just the 1/16 oz. cavity gave us incomplete molds. Tried pouring the entire block with lead, no hooks, to adequately pre-heat it up. We did this several times, then we'd put in a hook in the 1/16 oz. cavity and about 80% came out not fully formed. Very frustrating! Any suggestions?
"A voyage in search of knowledge need never abandon the spirit of adventure."