When you load a muzzle-loader, you first put in a measured amount of
gunpowder, and then you put a small, round patch over the end of the
barrel covering the hole. The ball is placed on the patch, and that
is rammed down. The patch is usually oiled cloth.
This makes the ball fit in the barrel tightly so it doesn't roll out
before firing and so the explosion of the gunpowder will propel the
ball out of the muzzle without dissipation around the ball. The ball
is round, but the early casting methods don't result in a perfectly
round ball.
The men would have to have a patch for each ball, so they'd both cast
the balls and make patches in advance.
I don't get a meaning of "ran balls", but I assume it means they
poured hot lead into the form to cast a ball.
"Extrude" is not right to me, since "extruding" is forcing something
out.
--
Tony Cooper - Orlando FL