>Set it up with your preferred gun shop. They may offer a gun at their cost.
>option of store credit if winner wants to upgrade or wants different brand.
>cover the transfer fee as part of the winnings.
>give caliber choices, not everyone may want the single caliber you offer. Cost you some ticket sales.
>know what your minimum goal is for proceeds on ticket sales.
>sell the heck out of the tickets.
>have a hard cut off date for the drawing.
>cheap tickets, $1 tickets vs $25 tickets. People will buy 25 $1 tickets, but not one $25 ticket.
>post it on here if it's not against the rules.
Good luck.