Thread: Re loading Rio Mini Magnum #3 hulls.

Someone with far more experience shotshell reloading may know different but ' not suitable for reloading' could just be arse covering or it may be that the carefully developed combination of shell, wad and powder with specific shot load can't be safely duplicated outside the factory.
Most shotshells have a brassy plated steel head rather than brass. originally at least, steel headed shotshells were not designed for reloading. Does a magnet stick to it? Some auto loaders with fairly generous chambers expand the head a lot and you might find re sizing steel to that degree difficult, possibly needing a 'size master 'type of press. In all I'd suggest that you would be far better off with shells intended to be reloaded.