Mickey-Please make copies of that tape.I will buy one and other big bore nuts may also.Or does he sell them?
About sizes.That is what I am finding, that there is
all different sizes.I think brass can be made to cover
most of the body sizes and shapes,, from 20mm cases and my case lathe.The old charts and old books showing
old 4 bore specs I have found in 3 places has the bore .935
which is about 6 bore.LAR showed me where they were.I recommend bigger like Millar
did, even bigger to .975 like the Evans is, to get closer
4 bore size, and the 20mm brass is perfect at that bore
size.Ed.