Conduct an introductory trapshooting scheme or competition. Schools are always interested in competitive events students can participate in. Talk to the sports coach first about these opportunities. Contact local merchants to sponsor competitive and informal events to donate prizes and added money. You will be surprised just how many merchants will participate when you give them the opportunity and also give them an advertising plug in your newsletter.
Every city has a writer's club.
Contact these writers and invite them to your club and ask if they will be willing to write a magazine article about trapshooting. Contact your local sports editor for the newspaper and radio. Invite them out when you are having a shoot and make sure they have a good time. They will do the write up nicely hoping you will gain new members and maybe place an ad. It's called a publicity release write-up.