OK, this might be common knowledge to many, but the first time I've seen it mentioned. IF you shoot 410s, you might enjoy the article!

http://www.4-10.freeuk.com/reloading303.html

I wonder what other possiblities this might offer? Ideas?

http://www.hr1871.com/firearms/index.php?cat=6&subcat=5

...."The .410/45 Colt model has a fully rifled barrel and screw-in choke for shotshell use."

GOOD LUCK! :)

I thought you could use 444 for 410 brass more easily.
Andy