How I make the top
But, but, but, how did you do it??? It has me confounded.
John,
Here is the way I made the top barrel using a cartridge. I now make them from brass round stock on my metal lathe.
Part-off the primer end at the length you want (0.45" is the length I use for the top) and a ring for the bottom.
I cut the 7mm tube to 1 13/16" and the blank to 1 1/2"
Glue the blank on the tube so it is even with the bottom of the tube
Cut tenons for the ring and top and glue. ( I use med CA)
Go slowly when turning the brass ends. You will develop a lot of heat cutting the brass and the heat will cause the glue to break-down.
A 8 deg taper is what I use.