Kev
Look under shotguns on this site and my name you will see the gun I am using. I don't know how to do a link.
I would love to do a 22 Hornet but 410 shotguns are a premium and I have never found a suitable one.
I got the shotgun from http://www.simpsonltd.com I hope to get this one finished soon, got one barrel chambered tonight so its getting closer. My next one (if I am still sane) will be a 400/450 or simular on a 12 guage frame.