Air guns are allowed. Slugs only for .22. Pellets for any caliber above that. You just have to tell them that's the division you want to shoot in.
Been shooting NRL22/NRLX22,PRS22 for 2 years. Have yet to see anyone shoot in the air gun class. Here in North central Oklahoma we’re lucky enough to have 5 places within 1.5 hours drive that hold monthly matches.
Stillwater gun club. Stillwater, Ok
22 Long Long Rifle Series. Medford, Ok
Longhorn Rimfire. Douglas, Ks
Recon by fire. Park hill, Ok
Open range, Ramona, Ok