I read in The Field or Shooting Gazette that those on "driven game circuit" (wealthy shooters hopping around Great Britain from one estate to another) used Perazzi 0/U guns. Not wanting to give all the business to Italians. DMB designed 8lb 0/U with long 30" or 32" barrels. It is bored to accept paper cased cartridge with felt wad and old style chilled shot. Well known English shooting instructor established British Vintagers on US Model indicating that perhaps SxS shotguns are even less popular in British game fields than they are in the USA.