Listed below are links to some sites related to shotgun sports for gun enthusiasts that might be of interest to you:

Beretta          Browning        Krieghoff         Remington          Perazzi         Winchester

Ontario Out of Doors        OPTA        NFA        Shotgun World       Birchwood Casey

Firearm Buy & Sell       Firearm Safety Education      GunPost

National Sporting Clay Assoc. Canada        Shotshell Cost Calculator