My first wood mold was 35 years ago. I made a simple conical bullet mold by
pinning two pieces of wood together, and drilling the seam with a proper
size drill bit at a high RPM and modest feed rate. Then I lightly
carbonized the cavity with a butane lighter. I found I could make about 50
bullets before they started to get a little to tight to feed into my old .45
Pennsylvania style cap and ball rifle. Linen patched of course. I just
wanted cheap bullets so I could afford powder and caps so I could shoot my
rifle, but they shot better than I expected. They held 3 inch groups off a
rest at 75 yards. Not awesome, but shootable. Commercial roundballs in the
same rifle would shoot an overlapping cloverleaf pattern at the same range.
Still. They worked. I did find if I upped hte powder charge slightly they
seemed to shoot a little beter, but for just target practice and fun
shooting I shot them with a pretty light powder charge.
Anyway, that's about the simplest wood mold to study I know of. I wonder if
my dad still has any of them laying around.