We are receiving alot of traffic from our fellow small bore shooters in Australia, Greece, Africa and the UK. These are countries where .410 shotguns are used quite a bit. The biggest question of late is regarding the .41 210 grain slug load and its ability to fit through a .410 shotgun barrel.
A .41 SWC will slide through a “Cylinder Bore” .410 shotgun with no resistance to speak of and come out the other end. Remember it must be a “cylinder bore” with NO choke! Any choke will likely be destroyed if you attempt to shoot a .41 semi wad cutter size slug and or a .41 pumpkin ball round.