So I'm totally new to shotshell reloading, I don't even have a press. Just a guns show find Lee Loader. As stated in the title, I recently purchased a new cantilever slug barrel for my 870. Also the Bushnell Trophy 1.75-4x32mm circle-x shot gun scope. I'm totally in the dark as to the type of slug mold to buy to use in a rifled barrel. I would like to use it for deer hunting as Ilive on the edge of a shotgun only zone. I realize every barrel will be different but is there a general rule as to the type of slug to use?