I have a new aluminum mold that refuses to cast wrinkle free bullets. I have scrubbed it with different solvents as well as hot soapy water and boiled it more than once. I've cast with very hot alloy (700+ degrees) for extended periods of time and still get defects every last time with this mold. I've used the same alloy at the same time to cast perfect bullets with several different molds so I don't think the problem is the alloy composition or temperature.
I apparently contaminated the cavities and may have done it with over zealous application of Bull Plate lube. I'm not pointing a finger at that product but it may be the thing causing wrinkles.
It has been suggested to me that I try baking it in an over for several hours to try and vaporize and get rid of whatever is generating the wrinkles.
Questions:
Has anyone experienced similar problems when using Bull Plate lube and if so how did you clean it off the mold?
Will it damage an aluminum mold to heat it for an extended period of time to a temperature of 200 degrees? 300 deg? 400 deg? Will this undo heat treating for the aluminum (it is listed as 2024 alloy)?
Has anyone ever tried this to get rid of grease, oil, etc. that causes wrinkles and resists removal by the usual methods?
I've tried cleaning the mold repeatedly and have been stymied so far in removing whatever is causing the problem. Any suggestions about how to get this mold working would be appreciated.
Making it even more frustrating is the results I've gotten shooting the bullets with wrinkles. I've gotten some pretty decent groups (1-1/2 inch 5 shot groups with a .357 Max Handi Rifle at 50 yards) even with the bad bullets. It is tantalizing to think what might be if only I could cast some good quality bullets.