Originally Posted by
justindad
Look at the parting line of the boolit at the very top of your image. I can see small divots on the driving bands, and maybe one inside the lube groove. These are caused by burrs in the mold. Place that boolit in the cavity of your mold and look at the vent lines that contact those divots - you’ll find a burr there. Burrs are easily formed at the intersection of the vent line and boolit cavity, and these burrs are the most difficult to remove without damaging anything.
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If your mold is freely raining boolits by just opening the handles, then I’m wrong.