Originally Posted By: OH Osthaus
i thought they were there to match the mouth of the brass shell and the theory was it would give a better gas seal for the fiber wads during the transition


Your explaination makes as much sense as any I have heard. I just wanted to see something a little more concrete, perhaps an explaination in a period catalog, or from a European proof house, something other than speculation.

And ridicule.


Best,
Ted