Frank

BACo will do you a mold in any desired diameter and design, here’s a link to some examples: https://www.buffaloarms.com/407-210-...jim407210.html

If you had a 40-65 (400 bore, 408 groove) then I could help you out with a few but the molds I have drop .409 diameter bullets when using 20:1 or Lyman #2

Not sure sizing down to your needs will work?

Brgds Terry