I just received two new Lyman moulds from Midsouth. One of the moulds is 410660 (I think) and the other is the 45-70 version of the same bullet that weighs about 480 gr.
When I opened the box and removed the mould both looked pretty good. The sprue plates need to be a bit looser and I need to break the edges of the sprue plate. When I held the blocks up and looked through the cavity I was surprised to see light at the bottom of the cavity on both moulds.
I have not degreased or cleaned up the moulds yet and am just wondering if a good washing and de-greasing will cure the problem. Where might I find instructions on tuning a new Lyman mould?
Thanks for your Help,
Bob