Many years (decades) ago I bought a Lyman 358156 SWC gas check mold for my revolvers. It has never applied gas checks correctly using either my original Lyman 45 or my Star. Having unearthed my revolvers, I wanted to cast some boolits and did some online research into applying gas checks correctly.
The result is that I either need to buy a plain base mold or convert my GC mold to PB; something I've heard can be done.
If this is correct, what is the preferred method to use? In addition to Dremel and Fordham tools, I have a 1946 Delta drill press and a used Taig micro mill that I have been using on another project.
Thank you,
Richard