Our club runs a CMP Rimfire Sporter match.
.22 lr, any repeating action, maximum weight 7.5 lbs, maximum scope 6X (also open sight division) minimum 3 lb trigger pull.
Prone, sitting, standing; slowfire and rapidfire at each position; 50 yds prone and sitting, 25 standing.
Read about it at
There is a forum where you can probably locate matches
Guns need not be expensive, the target is fairly generous. Lots'a 10-22s stock and souped up, lots of CZ 452s.