This is an old idea that is not well known.
All you need is a mold that has one or more driving bands into which a gas check will fit snugly. Insert the gas check upside down into the hot mold (be careful!), and pour. This is a Mountain Molds Custom for the Swiss Vetterli that casts a 0.433" 355 gr Semi Wad Cutter (SWC) bullet.
From this mold I am able to make five (5) different bullets that are (almost) Full Wad Cutters (FWC). I say "almost" FWC because the gas check step that is now on top is only about 0.400", not 0.433".
Left to Right: 113 gr, 151 gr (two are stacked), 196 gr, 238 gr, 292 gr, and the 355 gr SWC bullet for which the mold was designed.
Note that all of the FWC bullets are oriented upside-down to what the mold was designed - that's the gas check step on top.
I stacked two 151 gr FWC's to show that in rifles with a long neck, you could load two back to back. I've done this with homemade 45 cal FWC's in the 43 Mauser. Other candidates might be 45-70 and 444 Marlin.