Answering questions; bullet jackets from copper tubing
caps. This process makes jacketed slug with covered
nose. With heavy soft jacket as opposed to a
solid turned slug from solid rod or soft lead slug.

1/2" caps can make .700 and 12ga size jackets.
5/8" caps can do 8ga and maybe 10ga jkts.
And 3/4" caps can make 4ga. These cups are
malleable enough to shape into jackets,
without a 20 ton stamping press.

Interesting info about our posting of this subject on
about 5 dozen forums. One big general forum thread,
that we posted some info, has about 5 million views.It is
Mil Photo Forum a big world wide forum..
The top forum of the bunch, with whole thread on it
about 120,000 views, 2nd about 110,000 views, 3rd one
about 104,000 views, 4th one about 102,00 views.
We greatly appreciate all the interest from all
the forums, of all sizes. And all the help
and ideas too...Ed