RE: .22 hornet
I looked up on 22 K Hornet in my Hornady sixth edition book and the brass is a little different. It has a 40° shoulder compaired to the 22 Hornet with a 5° shoulder. It was originated by Lysle Kilbourn and is somewhat of a wildcat. I guess it’s not very popular because it was listed in only two of my 6 reloading books.