Chapuis wrote:It's a little complicated but I believe the answers given so far are not entirely correct in respect of firing ball from a musket. Surely by definition if only a single ball is loaded then it is no longer regarded as a shotgun. Off the top of my head I can't remember the minimum number of balls and the maximum size of those balls but it could well be as already mentioned by Demonic.
No. The regulations apply specifically to cartridges:
"(a) cartridges containing five or more shot, none of which exceeds .36 inch in diameter;"
So slug ammunition is section 1, but a round ball used in a "smooth bore gun" is not. It's not even considered as ammunition from a licencing perspective.
This goes around and around, because people make the same assumption without checking first...
If you have the same rifle, pre-conversion (so it's just a muzzle loader) it takes round balls which do not fall under any licence category (and won't be on your FAC).
If you then have an old Snider conversion using the same base, that now fires a black powder cartridge - the ammunition is section 1.