Well I made a cherry
...........And a soapstone mold.............Sorta
I was shooting for a finished ball diameter in the low to mid .560's range for a 24 ga. 58 cal smoothbore. Turned out a +/- .001 .557 sphere on the lathe kinda as described above except I made my cutter 1/2 circle minus a little on one side for the sprue and cut it straight in after roughing out the sphere. Cut my teeth on the cherry with the angled cuts of a sharp cold chisel. Teeth were cut in spiraling around the cherry. Supposed to cut more smoothly that way. Anyway I found out that chiseling in the teeth makes the cherry a good bit larger in diameter than you would think. Mine finished out at .570. Oh well, I hardened it with kasenit and went on. That was lesson one.
On to the mold blocks and lesson two - drilled my blocks for 1/4" wooden pins, drilled a sprue hole past ball center, countersunk sprue and drilled starter dimples in each block for the cherry to get a good start in So far, So good.
Soapstone cuts real fast and easy. I just used finger pressure to close the blocks around the cherry while rotating at slowest speed on my drill press. Her comes the screw up. The cherry started in the dimples but climbed up the sprue hole thus pushing the mold blocks Down, so I ended up with an elongated cavity. Had I rested the mold blocks on the drill press table, I'd a had a good mold.................Live and Learn
Cast it anyway and the top part was a perfect .570 diameter ball.....with an elongation on the bottom.
Used up my stash of soapstone But I still have the cherry!