Been checking the archives about making a D reamer for 45 acp truncated cone boolit. I've seen a couple ways for rifle ogive dies, and the only one that looks like I'll be able to make is the reformed carbide glass cuter. I've seen the cutter before and after pictures, however not much about the type. Are we talking about wally world B&D or MSC, Granger, Mcmaster Carr or some other type?
Second is there a design criteria for truncated projectiles or just best guess till something works.
Bill