Just beginning to cast boolits and working thru some issues with the process. My mould is a Lyman 457132, single cavity, and is the Postell bullet @ 535 gr. I'm using Lyman handles. The mold will not open unless I tap repeatedly with a wood mallet on the hinge pin. Once the mould opens the bullet will not drop again without repeated tapping. The mould seems to bind on the lube grooves because I can see the nose beging to open up while the lube grooves still resist. I've tried smoking the mould and that makes no difference. This will make it difficult to keep a fast pace between filling and dropping and keeping the mould hot.
This mould is new and was cleaned before using with soap and water, and brake cleaner.
Do I have a defective mould?