Bill:
I've been following this post from the beginning. Only wish I had the skills to do something like this.
I wanted to relay a story to you regarding the Win 21. Many years ago an old German gunsmith friend of mind had a fine cased Win 21 with two sets of barrels, one 12 gau the second was 405 Win and were suppose to be factory made. Have you ever heard of a factory made Win 21 with rifle barrels?
Bob