"Why are my bullets wrinkled???"
Cold mould, oil/grease/wax in mould. Usually asked by someone using aluminum moulds, particularly Lee, for the first time.
http://castboolits.gunloads.com/show...end-about-temp
Link to sticky explaining mould vs. alloy temperature, one of the most mis-understood facets of bullet casting, even by those who have been doing it for 50 years.
Gear
