Nick Andrews wrote:
> Now this looks interesting:
>
> http://www.lasc.us/Fryxell_Book_Chapter_14_MakeHPMould.htm
>
> I imagine you could machine a cutter in the shape of the bullet, oversize
> for shrink and swage tolerances, then flute it into a cutter like making a
> tap for threading, spin it in a mill and use the table to move your mold
> halves held in the vise into the spinning cutter one at a time, using a stop
> in the vise to index the halves to the same location so they line up just
> right.
>
The cutter making you describe is exactly how the cherry is made for a
new bullet shape. Your method with the mill might work, but closing the
two mold halves on the cherry ensures you'll get a whole bullet -- not
two oversize or undersize lobes. Even if the cherry is a few
thousandths off center, one lobe will be oversize by the amount the
other is under, and the amount of out of round from the overcut will be
small enough to take out with a sizing operation.
--
If, through hard work and perseverance, you finally get what you want,
it's probably a sign you weren't dreaming big enough.
Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com
Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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